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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).
Link Posted: 4/21/2023 9:40:17 AM EST
A 12 gauge hull cut off and filled with glue or hot glue works well too.
Link Posted: 4/21/2023 10:13:31 AM EST
My cheap solution:

Link Posted: 4/21/2023 10:58:44 AM EST
I used a piece of oak dowel.
Link Posted: 4/21/2023 11:10:18 AM EST
I don't even have a pressure plug.

Runs fine. What symptoms does this supposedly solve?
Link Posted: 4/21/2023 11:32:17 AM EST
Link Posted: 4/21/2023 12:32:37 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By -Obsessed-:
I don't even have a pressure plug.

Runs fine. What symptoms does this supposedly solve?
View Quote

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?!?
Link Posted: 4/21/2023 2:01:33 PM EST
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
Link Posted: 4/21/2023 3:11:54 PM EST
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. 👍👍
Link Posted: 4/21/2023 3:14:53 PM EST
Link Posted: 4/21/2023 4:42:08 PM EST
[Last Edit: LesStaley] [#10]
TNC.  PM sent🤓
Link Posted: 4/21/2023 8:25:03 PM EST
Link Posted: 4/21/2023 8:52:58 PM EST
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?
Link Posted: 4/21/2023 9:19:30 PM EST
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.
Link Posted: 4/21/2023 11:51:39 PM EST
[Last Edit: -Obsessed-] [#14]

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.

Link Posted: 4/27/2023 8:27:14 AM EST
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.
Link 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.
Link Posted: 8/28/2023 3:32:42 PM EST
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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