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WY, USA
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Posted: 4/21/2023 9:21:10 AM EST
[Last Edit: LesStaley]
Need a pressure plug behind your bolt group? Remove the buffer/spring assembly, drop in a cork out of a wine bottle, a quarter on top, and replace your buffer/spring. (Allowing a penny for the discarded wine bottle cork).
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TX, USA
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Posted: 4/21/2023 9:40:17 AM EST
[#1]
A 12 gauge hull cut off and filled with glue or hot glue works well too.
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FL, USA
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Posted: 4/21/2023 10:13:31 AM EST
[#2]
My cheap solution:
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Posted: 4/21/2023 10:58:44 AM EST
[#3]
I used a piece of oak dowel.
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Posted: 4/21/2023 11:10:18 AM EST
[#4]
I don't even have a pressure plug.
Runs fine. What symptoms does this supposedly solve? 
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Posted: 4/21/2023 11:32:17 AM EST
[#5]
I've been using a little delrin one I got from CMMG. Now I'm curious to shoot for groups both with and without the plug.
In theory, making the assembly tighter should reduce the chances of variability, but I've never actually tested it. |
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MN, USA
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Posted: 4/21/2023 12:32:37 PM EST
[#6]
Quote HistoryOriginally Posted By -Obsessed-: I don't even have a pressure plug. Runs fine. What symptoms does this supposedly solve? I have 2 dedicated AR-22's and neither have used a pressure plug. I swap those uppers onto lowers that have a standard spring/buffer and they run flawlessly. There was a dude peddling delrin pressure plugs on here a while back. Thought about it, but then thought why fix what ain't broke?!? |
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FL, USA
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Posted: 4/21/2023 2:01:33 PM EST
[#7]
I've broken two end plates... I lathe turned a rebated step in the edge of the buffer, so that the center of the buffer protrudes slightly past the retainer pin, into the lower... no problems since , and I can switch uppers on the SBR without messing with the buffer
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WY, USA
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Posted: 4/21/2023 3:11:54 PM EST
[#8]
Lots of good solutions. Keep ‘em coming guys. I especially like the suggestion of turning a ledge on the front of a stock buffer. Took my offending dedicated lower to the woods this morning with the $.26 solution and Shot 80 rounds +/- thru the 22. No misfires. Before would misfire one or two every magazine. 👍👍
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Posted: 4/21/2023 3:14:53 PM EST
[#9]
Quote HistoryOriginally Posted By LesStaley: Lots of good solutions. Keep ‘em coming guys. I especially like the suggestion of turning a ledge on the front of a stock buffer. Took my offending dedicated lower to the woods this morning with the $.26 solution and Shot 80 rounds +/- thru the 22. No misfires. Before would misfire one or two every magazine. 👍👍 Off topic, but last time I saw you we ate your cat.  How you been?
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WY, USA
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Posted: 4/21/2023 4:42:08 PM EST
[Last Edit: LesStaley]
[#10]
TNC. PM sent🤓
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Posted: 4/21/2023 8:25:03 PM EST
[#11]
Quote HistoryOriginally Posted By LesStaley: TNC. PM sent🤓 It did not come through, I'll send you one to make contact. |
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NH, USA
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Posted: 4/21/2023 8:52:58 PM EST
[#12]
I was wondering the same thing.
I have the RTB bolt setup and the bolt does not move at all even with the buffer tube, and buffer retainer removed. Are other bolt setups different? |
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Posted: 4/21/2023 9:19:30 PM EST
[#13]
Granted my .22 is a folder, but I use a 2mm silicone bumper (taken out of my photo printing stuff) to add tension on the conversion. Works great.
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Posted: 4/21/2023 11:51:39 PM EST
[Last Edit: -Obsessed-]
[#14]
Fine.
I present to you the JP Silent Captured...AR-22 Pressure Plug Thingy. Cost $0.03 to print the plug. The SCS was lying around.  
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Posted: 4/27/2023 8:27:14 AM EST
[#15]
When it comes to needing or not needing a pressure plug, it will depend on the overall tolerances and fit of the 22LR bolt, upper and lower receivers. Some combinations will benefit from some type of pressure plug while other rifles will do just fine without a pressure plug.
I have a few CMMG dedicated bolts and some builds have a plug while others do not. It all depends on how everything fits together and how much slop there is. I have found that dedicated bolts that do not use a collar such as the old TACSOL and Chiappa bolts do benefit from having a pressure plug. |
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OK, USA
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Posted: 8/21/2023 8:25:49 AM EST
[Last Edit: BuckMan123]
[#16]
I found a 3D File of the pressure plug on Printables. It was printed out of PLA+ and was a great improvement in reliability. I also printed a buffer out of TPU95 and doubled the original thickness.
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SC, USA
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Posted: 8/28/2023 3:32:42 PM EST
[#17]
My RTB upper needed one, had just a tiny bit of front-back play causing occasional FTF. I stuck a hose washer in mine just to see if it made a difference, it did. So I gladly paid $7 for a BoreBuddy pressure plug. No more FTF. If your setup runs fine, you don't need one.
The coolest solution I've seen is someone who machined their own buffer with a beveled face that acted like a pressure plug. Can't remember if I saw it here. The OPs solution reminds me of the seven quarter trick used as a spacer for 9mm AR builds using regular length buffers. |
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