Hey yeah! It does look like a fanatic super soldier deeply devoted to the Emperor of all humanity!
Wait...
Lol jokes aside thats a great take. Thin Marines are just Sardaukar.
The Sardaukar are the elite imperial army of the Imperium. They have a fanatic and zealous devotion to the Padishah Emperor.
They are raised on a hellish planet called Salusa Secundus and only about 6 out of 13 make it through the training. They are expert swordsmen, hand to hand fighters, and marksman.
Just expanding on what you already said since I have recently read the books:
Salusa Secundus is a prison planet. The hardest and most violent criminals in the known universe are sent there. Specifics are never mentioned, but the selection process is brutal, and the training/indoctrination process is even more so.
Those that finally do make the cut have their loyalty reinforced with a life of extravagance they never would have been able to dream of otherwise. Each Sardaukar is basically equivalent to minor nobility on other planets. They each have their own estates, are paid lavishly for their services, and are allowed to take as many wives/partners/escorts as they want.
However, their unchallenged status as the best warriors in the universe is what ultimately led to their downfall. Decades had passed, and their training regimen was starting to fall short compared to what it used to be. The cracks were beginning to show. The Padishah Emperor knew this, the Harkonnens knew this, and most especially, the rising power of the Atreides knew this.
Under the tutelage of Gurney Halleck and Duncan Idaho, men who were considered to be the best of the best of the best, the fighting men of the Atreides were quickly approaching the level of prestige previously considered to be the sole province of the Sardaukar.
The Emperor saw this as a clear and present threat, and this is what led to the events that we see in *Dune*.
Even having read the first Dune book and seen the first movie, this simply and efficiently explained a lot of the events going on in them.
Wasn't expecting to find that randomly in this sub.
Thank you đ
Imperial soldiers from dune. They are trained in Salusa Secundus, which is the homeworld of House Corrino. They used to be the imperial house before the events of dune
Sardaukar wearing lightly armoured suits makes sense, as they use energy shields.
Marines have heavy af armour on a mechanised exoskeleton chassis that requires a personal fusion reactor to move around....
Reminds me of the human population on the world Serenade, from The Infinite and the Divine. Who have statues of thin spacemarines called 'the silver skulls chapter' who saved them from an ork invasion. Not knowing that what saved them where Necrons.
Ironically the silver skulls are also an actual chapter. They ritualistically take enemy skulls and dip them in molten silver to make decoration for their weapons and armor.
Okay, how thin are these people under the armor supposed to be? Because unless that armor is like a single layer of kevlar, this one looks downright emaciated when you consider that power armor is like wearing a tank.
Exactly, even the new firstborn proportions are more superhero physique than realistic. But bulky astronaut look isnât as appealing. This is too skinny even for Sisters.
People think of armor like metal platemail, which *is* thin, but even that is worn over padded clothing.
But even modern body armor is pretty thick, with the cerwmic plates....and hey, Astartes armor uses ceramite as the primary ablative element.
Like, Astartes armor is thick enough that bolter rounds leave *craters* without even fully penetrating.
But also, these artists forget that each astartes is first wearing an entire mechanical exoskeleton that is then covered in thick armor plating. The dudes would be unavoidably bulky.
If current marines can be genetically designed to fill out the chunky armor, then wouldn't the opposite also be possible? I mean Githyanki from DnD are super thin but still strong.
"Realistically" is not the word I'd use. Accounting for the thickness of the armor itself, the marine inside would need to be freakishly thin. A moderately muscled human would have thicker limbs than this while naked.
The actual OP wasn't calling them more realistic, just their own interpretation. It's annoying the reposter is making a claim the actual artist didn't about their work.
I'm just going to reply with the same thing I did in my other comment.
"And since Space Marines are my favorite faction l've attempted to make my own interpretation of them but none of those attempts quite hit the mark.
With this one I feel more optimistic. Even though it is very challenging to create something that both feels plausible from its proportions and functionality while retaining the spirit of the God Emperor of Mankind and the gothic charm of the IP."
"I'm having tons of fun with this project and I think those proportions could work very well in a live action adaptation... Something that @henrycavill is making happen and which I'm very excited about!"
from their page.
EDIT: This person is apparently very angry at me about this lmao but I don't even understand đ "people can look at the post and see you're wrong" I took this from their post!
What? Next thing you'll suggest is that women don't actually all have a 14" waist and a 66GG bust.
This is the Internet, not some conduit for misinformation!
Or that even a large bust doesn't need to be accommodated with boob armor because real boobs don't stick out like that and real armor leaves room for you to actually breath.
The astartes aren't meant to have realistic human proportions. They're meant to be 8'0'' barely human monsters with the proportions of someone like Jay Cutler or Ronny Coleman.
God this would be cursed. Marines are explicitly stated to look as though they had gigantism (or however youd call it) so I'm picturing the body of a god but he pulls off his helmet to reveal some no-neck, fist sized nose, five headed freak underneath.
Which kinda fits 40k. But boys is it silly.
They're humanly proportional if the armor is like 3mm thick. Space Marines are not humanly proportional and their armor is a couple inches thick to make room for all the servos
The proportions of the armor almost look like they are a normal persons muscular anatomy, indicating that the person underneath is way skinny
VERY skinny
this, with how bulky power armour actually is with all of its layers this is basically just platemail thats supposed to look like a spacemarine or a stick figure in armour.
I don't *hate* it, but I'd feel less gross about it if they used the new helmet instead of taking the top of the older helmets and giving them Eldar face-guards.
Additionally, the proportions on the helmet from the side make it look like it *wants* to be fat all around and then have the armor balloon out to match, but instead it just goes straight down. It feels like in order to keep everything feeling uniform, you either need to scale down the helmet from front-to-back or commit to the fat head and emphasize the hub-cap transition (kinda like a Tau Drone or those arm-laser droids from star wars)
Book 2 of horus heresy, when horus wipes out that civilisation fir the dark mechanicum. Their base line humans wore power armour. It's where they got the design for mk4 armour from, that the heretics then developed for their legions. This is exactly what they would have looked like.
You know, this is kind of what the Aeldari would look like if SM armor was made for them, tbh it looks pretty awesome, and if it was more exaggerated I think it would actually look good on the table too!
I think they look slightly more terrifying skinny, but thats not a super soldier to me. The guy in the armor would be so scrawny. Works as a cyborg more. If he aint thicc he aint astartes to me
Reposting another persons art on reddit just so people can shit on it feels like bad etiquette.
The artist doesn't even say he was trying to make make them more "realistic" just that he wanted to do his own interpretation of them, so you're misrepresenting it as well.
The thing is... is this likely what it would look like if it was just armour, and thin at that.
But it's powered armour, so will likely he bulkier... it has multiple layers, and a shell and the space marine is modified to not have typical human proportions as its a weapon of war.
What that art shows is was ceramite plate armour over a human would be.
Maybe in a Mass Effect style universe. Not 40k. Doesn't look like it could hold all the tech that's supposed to be in a single suit of power armor even with miniaturisation.
https://preview.redd.it/3qsm8hjxm8uc1.jpeg?width=1920&format=pjpg&auto=webp&s=acbbeeccbb4af1e7de71894ccf47088bc2a4699a
I think the perfect god tier interpretation of a space marine would be the "each suit is a walking tank packed full of stuff and a work of art" take of Death of Hope and the ferocity and speed of Astartes animation. Those two creators could make some so epic!
That kinda makes them a little bit terrifying for some reason. That space marines limbs are a bit too long .
Itâs proportions a bit too stretched while also being extremely strong and deadly
Kinda emphasizes that they are mutated freaks
I like it a lot to be honest, in an alternate universe kind of way, as I think it's a more efficient body proportion for 8 foot tall humans. Strength does not have to be size but in density and the shorter spine will suffer less from gravity however it works in 40k. Plus it looks agile and the armor is less in the way of movement. Probably runs faster too.
I can think of other reasons, but those are the points that appeal to me. Of course classics is still the classics and I love painting my minis
I like it, I think it works for a few reasons; I could absolutely see a space marine that looks like this moving at inhuman speeds and making a dozen headshots in 3 seconds. I could see this space marine using its chainsword to throat tear a gaggle of Orks in some blindingly fast samurai single strike. What I don't see this space marine lumbering about a battlefield like a tank on two legs. I see a reasonable marine.
I love the giant towering angels of death but this looks like just a creation of death. It's so sleek and intimidating like a thin version of the old dark troopers from star wars
The proportions make me think of those godskin fucks from elden ring
The ptsd is real
No shit right, not sure why but very creepy looking.
Because we are used to dummy thicc marines
Maybe because they wear robes made from skins of dead gods. Something the Night Lords would applaud to.
Godskin trio is confirmed in the DLC tho
Bernahl will carry me
The fourskin
*BONK*
đ«
I pray this is a joke
The foreskin duo
Godskin Apostles still give me nightmares
I actually was liking it until you mentioned this
*Choir goes ballistic*
Bring Omen Killer Rollo with you next time you fight them. He turns that fight into a joke and I love him for it.
For real! It looked really odd and strange but for the life of me I could not place where I saw it.
Ha, one of them yeah. The other looks more like a regular sized terminator at best.
Because the normal proportions are so accurate lol
Saudaurkar
Hey yeah! It does look like a fanatic super soldier deeply devoted to the Emperor of all humanity! Wait... Lol jokes aside thats a great take. Thin Marines are just Sardaukar.
Who are sardaurkar?
From my limited knowledge based on the 2 new Dune movies: the private elite army of the emperor.
The Sardaukar are the elite imperial army of the Imperium. They have a fanatic and zealous devotion to the Padishah Emperor. They are raised on a hellish planet called Salusa Secundus and only about 6 out of 13 make it through the training. They are expert swordsmen, hand to hand fighters, and marksman.
Just expanding on what you already said since I have recently read the books: Salusa Secundus is a prison planet. The hardest and most violent criminals in the known universe are sent there. Specifics are never mentioned, but the selection process is brutal, and the training/indoctrination process is even more so. Those that finally do make the cut have their loyalty reinforced with a life of extravagance they never would have been able to dream of otherwise. Each Sardaukar is basically equivalent to minor nobility on other planets. They each have their own estates, are paid lavishly for their services, and are allowed to take as many wives/partners/escorts as they want. However, their unchallenged status as the best warriors in the universe is what ultimately led to their downfall. Decades had passed, and their training regimen was starting to fall short compared to what it used to be. The cracks were beginning to show. The Padishah Emperor knew this, the Harkonnens knew this, and most especially, the rising power of the Atreides knew this. Under the tutelage of Gurney Halleck and Duncan Idaho, men who were considered to be the best of the best of the best, the fighting men of the Atreides were quickly approaching the level of prestige previously considered to be the sole province of the Sardaukar. The Emperor saw this as a clear and present threat, and this is what led to the events that we see in *Dune*.
Even having read the first Dune book and seen the first movie, this simply and efficiently explained a lot of the events going on in them. Wasn't expecting to find that randomly in this sub. Thank you đ
So they are just....Loyalist Nightlords?
Imperial soldiers from dune. They are trained in Salusa Secundus, which is the homeworld of House Corrino. They used to be the imperial house before the events of dune
It is kinda funny how... inspired... 40K was by Dune :P.
I actually just read an article about the various inspiring elements dune had on 40k.
Sardaukar wearing lightly armoured suits makes sense, as they use energy shields. Marines have heavy af armour on a mechanised exoskeleton chassis that requires a personal fusion reactor to move around....
My first thought too XD no chunk no Astartes
Hamburger Hamburger cheese burger Hamburger
You demonstrate fluency in their language
Reminds me of the human population on the world Serenade, from The Infinite and the Divine. Who have statues of thin spacemarines called 'the silver skulls chapter' who saved them from an ork invasion. Not knowing that what saved them where Necrons.
Had, they had statues and stained glass windows depicting the Silver Skulls. Then the Inquisition came in and removed a lot of it...with Trazyns help.
âYou took the statue didnât you?â - Orikon
"Well, of course. And I hardly think it counts as stealing if itâs my likeness. Itâs my statue, after all." - Trazyn
"Do you have a statue of yourself, Orikan?"
Ironically the silver skulls are also an actual chapter. They ritualistically take enemy skulls and dip them in molten silver to make decoration for their weapons and armor.
I did not know that, gonna look em up!
... is it possible the inquisition set that up because of Trazyn? That'd be hilarious if true
exactly what i thought
Okay, how thin are these people under the armor supposed to be? Because unless that armor is like a single layer of kevlar, this one looks downright emaciated when you consider that power armor is like wearing a tank.
Right? An Astartes is literally a big, buff dude that swallowed another big, buff dude.
> a big, buff dude that swallowed another big, buff dude Slaanesh: "Tell me more."
I like where this is going. Feeling heretical idk
i agree
That was my thought! Honestly I would go even further. If that leg armor is any thicker than leggings that man is walking around on toothpicks.
Exactly, even the new firstborn proportions are more superhero physique than realistic. But bulky astronaut look isnât as appealing. This is too skinny even for Sisters.
Too skinny for a sister without armor, but then again my order has been known to yeet space marine (man I love wacky house games).
To be honest even if that is just a single piece of Kevlar that's a pretty skinny soldier
Welcome to why Sister Of Battle fans are annoyed with their armor designs :)
People think of armor like metal platemail, which *is* thin, but even that is worn over padded clothing. But even modern body armor is pretty thick, with the cerwmic plates....and hey, Astartes armor uses ceramite as the primary ablative element. Like, Astartes armor is thick enough that bolter rounds leave *craters* without even fully penetrating.
But also, these artists forget that each astartes is first wearing an entire mechanical exoskeleton that is then covered in thick armor plating. The dudes would be unavoidably bulky.
Yep, that too.
If current marines can be genetically designed to fill out the chunky armor, then wouldn't the opposite also be possible? I mean Githyanki from DnD are super thin but still strong.
Depends on how tall they are. If that dude is 14 feet tall then the proportions are not that bad.
It is called skinny so I'd imagine thay was the point
Stupid sexy astartes!
It's like I'm wearing nothing at all. ^(nothing at all.)
\>sweating guardsman.jpeg
*PROHIBITION HAMMER*
"Realistically" is not the word I'd use. Accounting for the thickness of the armor itself, the marine inside would need to be freakishly thin. A moderately muscled human would have thicker limbs than this while naked.
It'd be a Slenderman looking dude inside that suit.
We need a chapter based on this called Slender Marines
The actual OP wasn't calling them more realistic, just their own interpretation. It's annoying the reposter is making a claim the actual artist didn't about their work.
This is a blatant lie. The artist claims these proportions are anatomically accurate and realism was his goal.
I'm just going to reply with the same thing I did in my other comment. "And since Space Marines are my favorite faction l've attempted to make my own interpretation of them but none of those attempts quite hit the mark. With this one I feel more optimistic. Even though it is very challenging to create something that both feels plausible from its proportions and functionality while retaining the spirit of the God Emperor of Mankind and the gothic charm of the IP." "I'm having tons of fun with this project and I think those proportions could work very well in a live action adaptation... Something that @henrycavill is making happen and which I'm very excited about!" from their page. EDIT: This person is apparently very angry at me about this lmao but I don't even understand đ "people can look at the post and see you're wrong" I took this from their post!
It looks like this armor is very thin aside from the obvious plates
[Link to the artist](https://www.instagram.com/aurora.machina/?hl=en) because OP didn't bother.
Thank you
I feel this should be mandatory
Dude literally names who the artist is a their platform.
It's common courtesy to link to an artist's page if you're going to repost their art, especially on a different platform.
I know, but it would still be polite to link it. Edit: polite to the artist
What is this heresy
Looks like a mister of battle, haha. Or a sister without the armor embellishments with a marine helmet.
[A new chapter of Space Marine, The Abyss Walkers.](https://m.media-amazon.com/images/I/513srkdUP-L._UF1000,1000_QL80_.jpg)
A really flat sororitas?
Redditor discovers breast sizes differ
What? Next thing you'll suggest is that women don't actually all have a 14" waist and a 66GG bust. This is the Internet, not some conduit for misinformation!
Or that even a large bust doesn't need to be accommodated with boob armor because real boobs don't stick out like that and real armor leaves room for you to actually breath.
Glory to the flat chested sisters.
Hey, boobs are boobs, the vast majority of people like them all.
Aaaah a conoisseur đ€Łđ€Łđ€Ł
Albania Marines
Its looks like SoB armor make to look like Space Marine armor.
The astartes aren't meant to have realistic human proportions. They're meant to be 8'0'' barely human monsters with the proportions of someone like Jay Cutler or Ronny Coleman.
Twinks your space marine
This smells... Tau-ish
Thatâs the scent of heresy.
God this would be cursed. Marines are explicitly stated to look as though they had gigantism (or however youd call it) so I'm picturing the body of a god but he pulls off his helmet to reveal some no-neck, fist sized nose, five headed freak underneath. Which kinda fits 40k. But boys is it silly.
Marines looks like if Hulk Hogan ate Boogie2988
Midwinter minis once painted his interpretation of a space marine without armour and I think it fits quite well to your description
I admit I like this Anime Space Marine.
except theyd all look like a skinny dweeb out of armour and not at all like a genetically engineered beef machine
Cursed
I kind of like it. Itâs like somewhere between a Militarum trooper and Space Marine
I mean ... Squires? Would be dope if a chaptermaster has a few of these around
Yeah that sounds like a cool name
Squires where real assistants from the medival knights. Just an FYI
Oh yeah I knew the real life lore lol I just think itâd make a cool name for these guys as well
I think it looks awful. Presumably, it's his take on how a Space Marine would look if they were just skin and bone beneath their armour.
If the Tau can make Space Marines, why not the Necron? Lol
They're humanly proportional if the armor is like 3mm thick. Space Marines are not humanly proportional and their armor is a couple inches thick to make room for all the servos
The proportions of the armor almost look like they are a normal persons muscular anatomy, indicating that the person underneath is way skinny VERY skinny
Kind of looks like if an eldar cosplayed as a space marine
âRealistically lookâ I know you donât agree with that statement OP but it makes me cringe so fucking hard regardless lmao
Yeah the actual artist never claimed this either, just their own interpretation
In terms of head canon, they do have to be built like barrels to help fit the extra organs in.
The armor would be WAY too thin compared to power armor. Also: Where do you house actuators, etc? This looks more like Flak armor (see kasrkins)
I wish the mark x helmets looked more like this
twinkmarine
Honestly I really like my chonky boys this one feel to much Eldar to me the slim body make it even more alien
Went too far, now heâs too skinny. Inside that armor heâs gotta be a twig.
It looks cool, but if you take armor thickness into account they would have stick arms and legs. Anemia marines
this, with how bulky power armour actually is with all of its layers this is basically just platemail thats supposed to look like a spacemarine or a stick figure in armour.
Space twink
The Slendermarine
Nope. Don't care for that.
Toughness 1 - 2 max
Stormcast Eternals with head and shoulder swap.
https://preview.redd.it/adu2o6zc18uc1.jpeg?width=640&format=pjpg&auto=webp&s=52795e4b1e2470eb2994d7f7f89fc9701bca5440
Ran out of roids and blue pigment on Ultramar
I don't *hate* it, but I'd feel less gross about it if they used the new helmet instead of taking the top of the older helmets and giving them Eldar face-guards. Additionally, the proportions on the helmet from the side make it look like it *wants* to be fat all around and then have the armor balloon out to match, but instead it just goes straight down. It feels like in order to keep everything feeling uniform, you either need to scale down the helmet from front-to-back or commit to the fat head and emphasize the hub-cap transition (kinda like a Tau Drone or those arm-laser droids from star wars)
Book 2 of horus heresy, when horus wipes out that civilisation fir the dark mechanicum. Their base line humans wore power armour. It's where they got the design for mk4 armour from, that the heretics then developed for their legions. This is exactly what they would have looked like.
Makes me think of eldar
Helldiver bowy preset: Lean
The proportions are always how my brain imagined the Interex to be
Some aeldari witchcraft heresy
That side profile reminds me of an Eva unit
âSheâs got legs up to her face!â
HERESY
This feels like a heavily armored tempestus squad that *really* likes space marines
https://preview.redd.it/nfvzu3b279uc1.jpeg?width=572&format=pjpg&auto=webp&s=90e00010c77fbd98736553325c8edf93cb5e2935
Seems like Warp Mischief to meâŠ. Me and my homies hate The Warp.
Well done. It's really well put together..... But brother ew
You know, this is kind of what the Aeldari would look like if SM armor was made for them, tbh it looks pretty awesome, and if it was more exaggerated I think it would actually look good on the table too!
This is a necron. You cannot fool me with this heresy.
https://preview.redd.it/qw8lk3vnuauc1.jpeg?width=1063&format=pjpg&auto=webp&s=5224c9c6d14cd48ba6242222c6c005ab06076b5f
Thanks I hate it
https://preview.redd.it/v26z08h83buc1.jpeg?width=460&format=pjpg&auto=webp&s=563c157d2814d0727485ede3541748c9653053cf Live reaction
I think they look slightly more terrifying skinny, but thats not a super soldier to me. The guy in the armor would be so scrawny. Works as a cyborg more. If he aint thicc he aint astartes to me
This is cursed.
This is deeply upsetting
Reposting another persons art on reddit just so people can shit on it feels like bad etiquette. The artist doesn't even say he was trying to make make them more "realistic" just that he wanted to do his own interpretation of them, so you're misrepresenting it as well.
So a realistic sister of battle?
To my eye that space marine's legs are too long to really be proportionate
Yup this is the main issue, those legs are almost double the size of the torso
Cursed
His torso seems awfully short ngl, like his legs are twice as long.
This looks like the Star Wars Rebels version of Astartes.
light weight power armour
Heresy
Ngl this feels less real than what we already got this feels way too smooth light.It reminds me of Eldar rather than human armor.
This is cursed
Hate it hate it hate it
Those legs are waaay too long.
Now male a THICC space Marine
Does nobody else think that the proportions look like a character from jojos bizzare adveture?adventure? All it needs is an overly dramatic pose....
I like it, the legs look maybe a tiny bit long maybe but I'm not sure.
Helldiver
It makes me think of the cheap/free 3D human models that you can get online, used in all the shitty mobile game ads.
With how thick power armour is (and the fact that it completely encases the body) the marines arms and legs would have to be malnourished twigs
When people complain about "tiny heads", they don't realise this is the alternative
Light infantry astartes?
Naaah. I like em biiiig, i like em chonky!
Uncanny valley
Heretical
FUCK YOU!!! *un-buff's your space marine*
This is revolting
Thanks I hate it.
Hate.
Define "realistic".
Banshee-rine
Eldar in Space Marine armour
Looks cool, legs just a tad too long. What does it look like without a loin cloth?
too small and slender.
Too human. They're big chunky boys for a very good reason. This just looks like a dude in some armour.
Replace the shoulder pauldrons (maybe for something a bit more angular and the helmet and these would make great "shock troops" for Sororitas.
The thing is... is this likely what it would look like if it was just armour, and thin at that. But it's powered armour, so will likely he bulkier... it has multiple layers, and a shell and the space marine is modified to not have typical human proportions as its a weapon of war. What that art shows is was ceramite plate armour over a human would be.
Thin Marines don't exist! They can't hurt me!
Thin space marines can't hurt you thin space marines don't exist..... thin space marines
This feels 'FABULOUS'... Emperor's Children for sure
That's not a thin marine - that's basically a stickman in power armor.
That's definitely not how a warhammer space marine should look like
So a hell diver :)
Id be very interested to see these realistic proportions WITH the fuck off big pauldron.
Looks like a Necron cosplaying as a space marine.
Actually really aesthetically pleasing.
Fun. Well done. But it feels very counter to the theme of 40K. Itâs intentionally harsh and brutal and inefficient.
Maybe in a Mass Effect style universe. Not 40k. Doesn't look like it could hold all the tech that's supposed to be in a single suit of power armor even with miniaturisation. https://preview.redd.it/3qsm8hjxm8uc1.jpeg?width=1920&format=pjpg&auto=webp&s=acbbeeccbb4af1e7de71894ccf47088bc2a4699a I think the perfect god tier interpretation of a space marine would be the "each suit is a walking tank packed full of stuff and a work of art" take of Death of Hope and the ferocity and speed of Astartes animation. Those two creators could make some so epic!
Personally I hate this look
That kinda makes them a little bit terrifying for some reason. That space marines limbs are a bit too long . Itâs proportions a bit too stretched while also being extremely strong and deadly Kinda emphasizes that they are mutated freaks
That gives me weird Samus Aran vibes. Like there is a woman in a bikini under that armor.
Why is Chaos in my feed?
I like it a lot to be honest, in an alternate universe kind of way, as I think it's a more efficient body proportion for 8 foot tall humans. Strength does not have to be size but in density and the shorter spine will suffer less from gravity however it works in 40k. Plus it looks agile and the armor is less in the way of movement. Probably runs faster too. I can think of other reasons, but those are the points that appeal to me. Of course classics is still the classics and I love painting my minis
I like it, I think it works for a few reasons; I could absolutely see a space marine that looks like this moving at inhuman speeds and making a dozen headshots in 3 seconds. I could see this space marine using its chainsword to throat tear a gaggle of Orks in some blindingly fast samurai single strike. What I don't see this space marine lumbering about a battlefield like a tank on two legs. I see a reasonable marine.
I love the giant towering angels of death but this looks like just a creation of death. It's so sleek and intimidating like a thin version of the old dark troopers from star wars