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Posted: 4/17/2021 11:01:49 PM EDT
[#1]
What suppressor does your buddy have?
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Posted: 4/17/2021 11:39:13 PM EDT
[#2]
Griffin revolution 9
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Posted: 4/18/2021 12:01:03 AM EDT
[#3]
First thing you should do is disassemble the gun and check the buffer to see if the carrier is hitting it.Also look for roller marks on the rear of the receiver.Both of those things indicate that the gun is cycling to fast/hard.Also you are gonna more than likely need to replace the extractor spring...What was your bolt gap at after swapping locking pieces?
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Posted: 4/18/2021 12:40:53 AM EDT
[#4]
Buffer looks good.
Bolt gap-que? I sent it back in to PTR and they sent it back assembled with the locking piece in. |
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Posted: 4/18/2021 2:12:18 AM EDT
[#5]
Quote HistoryQuoted: Buffer looks good. Bolt gap-que? I sent it back in to PTR and they sent it back assembled with the locking piece in. Check it anyway.There are alot of variables involved.These guns don’t have a “gas system” that you can turn a screw and magically make work with a suppressor.On these guns you change the function of them by swapping locking pieces and playing with the bolt gap.If it works with one suppressor and not the other you have to figure out if it’s cycling too hard or not cycling enough.Either situation will cause malfunctions.You may be able to try different ammo as well. |
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Posted: 5/25/2021 10:09:23 AM EDT
[#6]
@last_crusader
Any updates? I just ordered a 9kt and will be going through the 80* locking piece myself. |
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Posted: 5/25/2021 1:04:17 PM EDT
[#7]
I had to replace the rollers with a +8 set, brings bolt gap to .018.
Measure the bolt gap with a feeler gauge, should let you know before you even fire a shot. |
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Posted: 5/25/2021 3:35:01 PM EDT
[#8]
Thanks for the update!
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Posted: 5/25/2021 3:41:33 PM EDT
[#9]
Bet the main culprit is the extractor spring on its way out. Increased bolt thrust from suppressed just helped rear its head
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Posted: 5/25/2021 6:27:58 PM EDT
[#10]
Every time I shoot my full size MP5 suppressed I blow an extractor spring.
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Posted: 5/25/2021 9:14:36 PM EDT
[#11]
Quote HistoryQuoted: Every time I shoot my full size MP5 suppressed I blow an extractor spring. That’s bizarre. I’ve run at least 800 rounds through my PTR 9CT suppressed (Silencerco Omega 9K) without a single issue, extractor or otherwise. |
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Posted: 5/26/2021 1:14:09 PM EDT
[#12]
3500 rds through my PTR 9c, about half that with the GSL Phoenix and no issues.
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Posted: 5/26/2021 3:29:22 PM EDT
[#13]
Quote HistoryQuoted: Every time I shoot my full size MP5 suppressed I blow an extractor spring. What ammo are you shooting suppressed? I had an issue with 150gr Federal Syntech causing a jam after a magazine's worth of it and messed up the extractor spring. The projectile Federal uses is a flat nose that acts more like a hollow point which MP5's are notoriously finicky about feeding sometimes. That experience ended my range day and pushed me towards buying the MAD bolt head. |
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Posted: 5/30/2021 9:50:35 AM EDT
[#14]
FWIW, I installed my 80* LP yesterday and it dropped right in place and my bolt gap is .017
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Posted: 5/30/2021 4:55:13 PM EDT
[#15]
Quote HistoryQuoted: Every time I shoot my full size MP5 suppressed I blow an extractor spring. My PDW, Navy, .40S&W and SD all go thousands of rounds. I've gone 10k (mostly suppressed) out of my MP5-N without lowing an extractor spring. Of course, my guns are properly built and all German except for the .40. It matters, despite what the "jus as good" crowd will tell you. |
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Posted: 5/30/2021 5:22:30 PM EDT
[#16]
Quote HistoryQuoted: What ammo are you shooting suppressed? I had an issue with 150gr Federal Syntech causing a jam after a magazine's worth of it and messed up the extractor spring. The projectile Federal uses is a flat nose that acts more like a hollow point which MP5's are notoriously finicky about feeding sometimes. That experience ended my range day and pushed me towards buying the MAD bolt head. I shoot mil surplus ammo (non-subsonic). |
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