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Rimfire Firearms .22, .17 and other Rimfire Handguns and Rifles |
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#1
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PSA 22 AR upper/BCG issus
Hey guys,
I got issues with my new PSA 22lr/ BCG group. I slapped it on my Spikes lower that uses a Toms tactical NiB trigger group. I also bought three CMMG 10 round mags and loaded those with some CCI mini mags. The first four rounds that I loaded in all had lite primer strikes. The next few shot, then I had some failure to feed. The rounds seemed to be feeding in at steep of and angle and bent the cartridge. I had that happen quite a few times. Tried all three mags but all seemed to have the same issue. I stopped and pulled the BCG and oiled the firing pin. I hand cycled the pin about 80 times to stretch the firing spring. It felt stronger than I expected when pushing on it. I put the BCG back it and shot a few more rounds until I had a few more failure to feed. I seems like there is a lot of slop with CMMG mag in the Spikes lower. If I pulled the mag towards me when firing, it seemed to feed better better. I shot through a couple more mags with maybe on more lite primer strike and a stove pipe. I then let go of the mag and held the hand guard for the remaining shots. Half way through the last mag I got a failure to eject that got lodged in the barrel. At that point I stopped and called it a night. Have any of you with 22 AR experienced these problems? I think the lite primer strikes will go away once I break in the BCG but is that normal? Could it be a weak trigger spring? Failure to feed. Have you guys had feeding issues with CMMG mags. Do other brands of magazines like the Blackdogs have less slop? Could there be some other issue with the upper or lower tolerances? My 5.56 Radical upper runs with out any kind of issues on the Spikes lower. Thanks in advanced your help. |
#2
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I use 15 22 mags with a better mag adapter and it runs great. Friend uses the same cmmg with cmmg mags and has all the issues you are experiencing. I think it's the mags. I never tried mine so I will test them out.
Sent from my SM-N950U using Tapatalk |
#3
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Quote:
Op's comment about slop between the magwell/feed ramp and magazine may likely be the problem. While I have not seen this with a PSA upper, I have experienced a similar situation with a Marlin 795 where there was a tolerance issue between a magazine and the feed ramp. In that case anytime there was backward pressure on the magazine from sling or hand, then there was an increase in feed issues. Good luck trouble shooting!
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ARFrog Last edited by ARFrog; 02-05-2019 at 9:45 PM.. |
#4
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CMMG upper and BlackDog mags, runs like a machine.
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#6
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The PSA site lists Black Dog magazines.
When I was researching .22LR uppers, I was under the impression that CMMG mags were made to run with their conversion kits, and that there was a difference between those mags and Black Dog mags. In my experience, the Black Dog mags with metal feed lips will eventually crack where they attach to the mag body. I have seen this on my original purchase, and on the replacements that Black Dog sent to me. I have not seen this with their plastic feed lips.
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NRA Life Member CRPA Life Member Registration is the first step towards confiscation. I identify as Non-Bidenary |
#7
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#9
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I bought a CMMG 22lr convert kit and use it in a Rock River upper with a Superior lower with Black Dog mags. No issues. Never used, never plan to use the CMMG mag. Too long, and I am not a AR purist having to use 30 rnd length mags. It hangs too low to be useful. CCI Mini mags and Winchester rnds have worked great.
Psalm 1 |
#10
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My new PSA 22 upper was producing light primer strikes and jams when I used the Black Dog and CMMG mags. I put in a Wolf heavy duty hammer spring, and now it functions fine with both mags. Brownells from time to time has free shipping. You can get the Black Dogs for $15.00.
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#11
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I run the CMMG conversion kit with CMMG mags, haven't had any issues.
From pics on the PSA site, the bcg doesn't appear to have a barrel collar with adapter. I believe this adapter assists in seating for feeding reliability. Can you confirm? Maybe because it's a dedicated upper, the barrel incorporates the collar for seating. CMMG BCG with collar and adapter.
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LA County CCW Renewal Progress 4/01/21: Mailed CCW app w/GC: Yellow. 4/14/21: $30 App Fee check deposited 5/25/21: Request for interview 6/03/21: Interview completed and Livescan submitted w/CA and FBI completed 6/14/21: Firearms Livescan: completed 8/16/21: Request to complete firearms training 8/22/21: Gun training completed/Certs submitted 10/11/21: Call to pickup 10/13/21: CCW permit picked up Last edited by jimster716; 02-06-2019 at 8:47 AM.. |
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#14
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Yeah I'm amazed at how much play there is with the cmmg mags. My AR hexmags have very little play so I wonder if it's a manufacturing issue. It seems like if it had a tighter fit it wouldn't be an issue. Hopefully the light primer strikes go away when I finish my 22 dedicated lower. I'll try that Wolf hammer spring in there.
Thanks guys. |
#15
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Sent from my SM-G965U using Tapatalk
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"It is currently CA legal to modify a double-action revolver into a single-action revolver and modify a single-action revolver into a double-action revolver. CA DOJ BOF stance on modifying handguns only applies to dimensionally compliant bolt-action single-shot pistols and dimensionally compliant break-open single-shot pistols. ^It does not apply to revolvers, manually operated repeating pistols, and semi-auto pistols." ~~ Quiet |
#16
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I've finally got this upper to work more reliably. I took some advice from you guys and bought a Wolf heavy duty hammer spring and the Better mags adapter//S&W 15-22 mags, and the CMMG 22lr specific charging handle. I found the charging handle at a local gun store on blow out for $10. At that price I had to pick it up. The heavier duty hammer spring got rid of the lite primer strikes. Even with the better mags adapter and 15-22 mags, I still got FTEs. The FTEs pretty much went away. This adapter took out all slop and was allowing a more consistent feed angle.
I have managed to significantly decrease the FTEs by inserting a .5"x1" long PVC pipe in between the buffer and the back of the BCG. It's basically doing what the discontinued Taccom pressure plug did. I notched the bottom of the pipe so that it's held behind the buffer retain pin. The notch allows about .25" of it to protrude forward and puts pressure on the BCG. Before adding this the BCG would move slighting backwards when pulling the charging handle and loading a round. Now the BCG doesn't move and the FTEs are very rare. |
#17
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Just a clarification...are you saying that when you previously were having the light primer strikes and FTEs that you were running it without anything in the buffer tube?
There is another recent thread in the Rimfire forum where this was the case and the OP was having a similar problem until he added a spring/buffer. Another OP commented on a sprinkler pipe working for him. http://www.calguns.net/calgunforum/s....php?t=1513827 All I know is that the empty tube seems to create a problem and it may be compounded by the mag play that you were also describing. The BCG appears to need something behinds it and the magazine play can mess with the feeding process. Good luck running it down. When you do you will find it very gratifying.
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ARFrog |
#18
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had the identical problem with the same upper. Send it back to PSA and when it was returned to me they said they had cleaned it and that it was working perfectly. Upon trying it again instantly had the same problems. Sent it back to PSA again and because they were out of stock on that particular up or at the time they upgraded to the 22 upper with the stainless steel bolt in it. I've now run probably 5000 rounds through it and it's 99% flawless. If you haven't sent it in to PSA, I suggest you do so and see if you can get an upgrade as I did. Good luck
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#19
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#20
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I do think at least a suitable mention in a FAQ would be in order. This would at least forewarn purchasers and remove the trial and error issues or product put downs when in reality it may be operator error. By the way, I also have the nickel BCG and have not had issues with it. I had read elsewhere that there were early problems with the cheaper nitride version build but had not seen recent comments about this.
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ARFrog |
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