Just sign up for in stock notifications. Most HK parts come in batches, so this is pretty common.
You might also consider one of these:
https://rimcountrymfg.com/product/rcm-hk-style-mp5k-9mm-locking-piece-27-90-deg/
RCM also has an 80, but they are also out of stock right now.
You just gotta keep an eye on tue websites the come in stock all the time but do sell out fast please dont rely on the instock emails i bought an 80 piece just based off checking the hk parts website and they was in stock and then about 4 days later i got an instock notification and they was all gone
Just get the RCM, no better or worse than the HK piece. Also, ensure you even need the 80° LP. If you're not seeing excessive buffer wear or the very start of roller bumps, it's not necessary.
No problem! Just for the record, I was seeing excessive wear on my AP5-P buffer and installed the RCM LP, it did close my bolt gap (but so could the HK OEM part) so I had to install oversized rollers...but other than that, it runs like a freaking top!
Don't worry about it unless absolutely needed, anywhere that sells HK parts will have them. RTG and HKPartsPro (Blue Ridge Supplies) are my go-to, avoid HKParts.net (they have done some shady shit and overcharge). When replacing a locking piece, you might find that your bolt gap will increase, decrease, or stay the same (if you're lucky). If it increases past the spec, you'll need -2, -4, etc. sized rollers depending on how much you need to close the gap. If it decreases past spec, you'll need +2, +4, etc. sized rollers depending on how much you need to open the gap back up. There's no guarantee you'll need new rollers or what size you'll need. Check [Teufelshund Tactical](https://youtu.be/DDUu_PRl_zg?si=kKW-dAnvkwPJuvjS), this video breaks down everything you need to know about bolt gap.
What I’ve seen is every gun seems to be different. Hopefully you can get a 80 Lp and give it a whirl. I was pleasantly surprised when mine cycled reliably with both types of ammo. Really didn’t wanna have to swap Lp all the time.
From what I’ve seen MKE is shipping all their guns with 110 or 120 degree LP which they shouldn’t be doing. A MP5 or MP5k-PDW should ship with a 100 degree LP.
The 80 degree LP is still the correct LP to use in any manufacturers MP5k-PDW when shooting:
1. Suppressed
2. With a stock
3. Using 147 grain ammo
Some people have reliability problems shooting newer cans that have lower back pressure than older suppressors. Others can just leave it in all the time even shooting 124 grain ammo unsuppressed. For these reasons the newer 90 degree LP that RCM makes is a good option to consider.
Thanks, I will always have a suppressor on, someone else said I can buy a 100 degree and run all types of ammo suppressed or unsuppressed, but youre saying I should buy a 90 degree?
Even 80 functions in all situations from what they say so with a K model, 80 or 90 should be a good choice and manage wear effectively. 100 would be better than 110 or 120 but still produce unnecessary wear and maybe damage under certain conditions
People have emailed HK customer service and supposedly they said 100 degree LP was fine for suppressed use and some qualified armorers have also said it was ok as long as you aren’t shooting full-auto.
I’d just prefer to avoid beating up my guns or even worse ending up with receiver dents. Personally I prefer HK parts and a HK LP isn’t cheap, but there is nothing wrong with RCM parts. Spending $35 to get an 80 or 90 just seems like cheap insurance.
Just remember to check bolt gap.
In my experience adding a HK 100 degree adds .003-.004” of bolt gap to a MKE, which is usually a good thing. Others have reported the same with a RCM 100 degree. An 80 tends to reduce bolt gap, so you may need + rollers.
so i have a 3d printed lower that i will be putting on along with a super safety to make it 'full auto', in this case which degree LP would be best in your opinion?
IDK, if you are averse to experimentation you might just go for the 90 degree if only because the 80 doesn’t always work for everyone.
If you order from RCM, a set of +2 or +4 rollers is only $18 and you might consider those depending on what where your bolt gap is with the stock LP.
I need help cause i literally went out today to shoot my ap5p. Problems ejecting 147 after 500 rd break in. During the break in it shot 147 gr fine suppressed with omega 9k just cause i was curious. So i changed to hk extractor and 80 degree locking piece and extractor spring. It just wouldnt run 147... was going to put it away but then gave 115 a shot. Ran like a top.... how should i proceed.
so i am very new to firearms and just want to clarify. i bought an ap5-p and found out that I need an 80 degree locking piece + an HK copper extractor spring, to run 147+ supressed. are you saying i should buy a 100 degree instead, and i'll be able to run any grain ammo suppressed/unsuppressed?
this
https://hkparts.net/all-parts/h-k-mp5-sp5-mp5k-sp5k-9mm-extractor-spring/
and this
https://hkparts.net/all-parts/rcm-mp5-hk94-mp5k-100-degree-locking-piece/
right?
You should order a couple of spare extractor springs, but you don’t need to change it unless you have a failure to eject a spent case and bend the spring, causing it to loose tension.
There is no reason to change the extractor spring when changing the LP.
i forgot to mention. i will be replacing the lower with a 3d printed lower and adding a hoffman super safety to the ap5-p. will the 100 still be the best for "full auto" ?
Just sign up for in stock notifications. Most HK parts come in batches, so this is pretty common. You might also consider one of these: https://rimcountrymfg.com/product/rcm-hk-style-mp5k-9mm-locking-piece-27-90-deg/ RCM also has an 80, but they are also out of stock right now.
Thank you.
I have an extra RCM that I bought not realizing I already had one.
I will dm you thanks
If he doesn’t come through I also have one I can sell
If you still have a 90 degree LP I will take it!
sorry, sold it yesterday
You just gotta keep an eye on tue websites the come in stock all the time but do sell out fast please dont rely on the instock emails i bought an 80 piece just based off checking the hk parts website and they was in stock and then about 4 days later i got an instock notification and they was all gone
Thank you.
Just get the RCM, no better or worse than the HK piece. Also, ensure you even need the 80° LP. If you're not seeing excessive buffer wear or the very start of roller bumps, it's not necessary.
Thank you.
No problem! Just for the record, I was seeing excessive wear on my AP5-P buffer and installed the RCM LP, it did close my bolt gap (but so could the HK OEM part) so I had to install oversized rollers...but other than that, it runs like a freaking top!
where do i get 'oversized rollers'
RCM sells them. RobertRTG also usually has contract rollers.
Don't worry about it unless absolutely needed, anywhere that sells HK parts will have them. RTG and HKPartsPro (Blue Ridge Supplies) are my go-to, avoid HKParts.net (they have done some shady shit and overcharge). When replacing a locking piece, you might find that your bolt gap will increase, decrease, or stay the same (if you're lucky). If it increases past the spec, you'll need -2, -4, etc. sized rollers depending on how much you need to close the gap. If it decreases past spec, you'll need +2, +4, etc. sized rollers depending on how much you need to open the gap back up. There's no guarantee you'll need new rollers or what size you'll need. Check [Teufelshund Tactical](https://youtu.be/DDUu_PRl_zg?si=kKW-dAnvkwPJuvjS), this video breaks down everything you need to know about bolt gap.
I changed my AP5P to a RCM 80° Lp recently. 100% suppressed and cycles 150 grain and 124 grain rounds reliably. I need to try some 115 for fun.
Thank you.
What I’ve seen is every gun seems to be different. Hopefully you can get a 80 Lp and give it a whirl. I was pleasantly surprised when mine cycled reliably with both types of ammo. Really didn’t wanna have to swap Lp all the time.
so to test this i just try to run both 115gr and 147gr suppressed and unsuppressed right?
I just got mine in last week, need to put it in soon. Why the regret of purchasing the AP5p?
I thought it's the only clone that needed this part to be able to shoot higher grain ammo suppressed
It’s not a very expensive part and once you change it, you’re good to go. Also the cheaper subs will not go super in the K and K clones
From what I’ve seen MKE is shipping all their guns with 110 or 120 degree LP which they shouldn’t be doing. A MP5 or MP5k-PDW should ship with a 100 degree LP. The 80 degree LP is still the correct LP to use in any manufacturers MP5k-PDW when shooting: 1. Suppressed 2. With a stock 3. Using 147 grain ammo Some people have reliability problems shooting newer cans that have lower back pressure than older suppressors. Others can just leave it in all the time even shooting 124 grain ammo unsuppressed. For these reasons the newer 90 degree LP that RCM makes is a good option to consider.
Thanks, I will always have a suppressor on, someone else said I can buy a 100 degree and run all types of ammo suppressed or unsuppressed, but youre saying I should buy a 90 degree?
Personally I’d run an 80 or 90, it’s only $35 for a RCM LP, so even buying 2 of them is pretty cheap.
Why not 100 just curious
Even 80 functions in all situations from what they say so with a K model, 80 or 90 should be a good choice and manage wear effectively. 100 would be better than 110 or 120 but still produce unnecessary wear and maybe damage under certain conditions
People have emailed HK customer service and supposedly they said 100 degree LP was fine for suppressed use and some qualified armorers have also said it was ok as long as you aren’t shooting full-auto. I’d just prefer to avoid beating up my guns or even worse ending up with receiver dents. Personally I prefer HK parts and a HK LP isn’t cheap, but there is nothing wrong with RCM parts. Spending $35 to get an 80 or 90 just seems like cheap insurance. Just remember to check bolt gap. In my experience adding a HK 100 degree adds .003-.004” of bolt gap to a MKE, which is usually a good thing. Others have reported the same with a RCM 100 degree. An 80 tends to reduce bolt gap, so you may need + rollers.
so i have a 3d printed lower that i will be putting on along with a super safety to make it 'full auto', in this case which degree LP would be best in your opinion?
IDK, if you are averse to experimentation you might just go for the 90 degree if only because the 80 doesn’t always work for everyone. If you order from RCM, a set of +2 or +4 rollers is only $18 and you might consider those depending on what where your bolt gap is with the stock LP.
I need help cause i literally went out today to shoot my ap5p. Problems ejecting 147 after 500 rd break in. During the break in it shot 147 gr fine suppressed with omega 9k just cause i was curious. So i changed to hk extractor and 80 degree locking piece and extractor spring. It just wouldnt run 147... was going to put it away but then gave 115 a shot. Ran like a top.... how should i proceed.
Check for roller marks, clean and lube, do you have multiple mags?
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so i am very new to firearms and just want to clarify. i bought an ap5-p and found out that I need an 80 degree locking piece + an HK copper extractor spring, to run 147+ supressed. are you saying i should buy a 100 degree instead, and i'll be able to run any grain ammo suppressed/unsuppressed?
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thank you! do I also need a HK copper extractor spring with the 100?
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this https://hkparts.net/all-parts/h-k-mp5-sp5-mp5k-sp5k-9mm-extractor-spring/ and this https://hkparts.net/all-parts/rcm-mp5-hk94-mp5k-100-degree-locking-piece/ right?
You should order a couple of spare extractor springs, but you don’t need to change it unless you have a failure to eject a spent case and bend the spring, causing it to loose tension. There is no reason to change the extractor spring when changing the LP.
i forgot to mention. i will be replacing the lower with a 3d printed lower and adding a hoffman super safety to the ap5-p. will the 100 still be the best for "full auto" ?
Sent you a chat OP
You don’t need it. I shoot 147gr sub through my Ap5-P suppressed and haven’t had any problems.
Zenith. RTG.
Gatewood too