View Full Version : Mushrooming buffer
04-20-2011, 01:48 AM
I'm using a TNW QC piston upper with a Rock River carbine lower. I noticed that the buffer spring was getting noisy . When I took it down I noticed that the plastic end of the buffer was flared out where it joins the metal.Is this normal? Should I get a heavier buffer?:confused:
Do piston kits come with an adjustable gas valve? Sounds like you're a candidate for one if they do, or I'd guess too heavy a buffer or dirty tube. Heavy buffer wants to stay at rest until a greater force is acted upon it, greater force peens plastic before buffer starts rearward movement into spring. Lastly, your idea of a stronger spring, but then you worry about battering the plastic, not to mention the extension as all of that force comes forward and bangs home. Usually striping the round has a slowing before impact effect.
04-20-2011, 09:22 PM
Post a picture
04-21-2011, 05:50 PM
I've had 2 buffer related issues.
One was an out-of spec buffer tube that was too short. A real pain to diagnose. Caused the buffer to hit hard and not lock back on the last round.
The second issue was when I replaced an A2 stock with a Magpul PRS. The A2 screw that goes into the buffer tube was too long for the PRS stock. It protrudes into the tube and the buffer slams against the screw rather than the back of the tube. Caused lock-back failures.
04-25-2011, 02:25 PM
I too would like a picture.
04-26-2011, 03:55 AM
It almost sounds like his buffer is striking the rear of the tube. I would think that the compressed spring would prohibit the buffer from striking the rear of the buffer tube though. Maybe the spring is short, or the buffer is extra long, like using a rifle length buffer in a carbine buffer tube. But I doubt he would miss that..photos sure would help.
04-27-2011, 02:54 PM
Not the best picture, but I'm still learning. I've got an H2 buffer and new spring coming.
04-27-2011, 10:30 PM
Spring too short or weak
04-28-2011, 03:13 AM
I would have to agree with warped on that one. Thats some pretty devastating hits to the rear of the buffer. I would try a new spring first and go from there. It would be a cheap place to start anyways.
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