Pitting/scuffing BCM buffer...?
- Thread starter Naaman
- Start date
It could be a small burr on the back of the carrier.
Or it could be an out of spec retainer hole allowing the buffer to smack the retainer while in use.
Keeping your front pin in, while closing the receiver down can you tell if the bcg pushes the buffer back. The bcg should prevent the buffer from hitting the retaining pin.
Or it could be an out of spec retainer hole allowing the buffer to smack the retainer while in use.
Keeping your front pin in, while closing the receiver down can you tell if the bcg pushes the buffer back. The bcg should prevent the buffer from hitting the retaining pin.
How many rounds do you have on that rifle?
If it is the retainer hole you could try an offset retaining pin or talk to bcm.
https://gallowayprecision.com/offset-buffer-retainer-for-AR-15-rifles
If it is the retainer hole you could try an offset retaining pin or talk to bcm.
https://gallowayprecision.com/offset-buffer-retainer-for-AR-15-rifles
Okay did some more investigating.
The carrier DOES push the buffer back.
After marking the buffer and cycling the rifle several dozen times, the buffer rotates counter clockwise bit by bit with each cycle.
Makes me think that the damage happened all at once (?) Otherwise, it would be evenly distributed along the rim of the buffer. Does that sound logical, or am I missing something?
The carrier DOES push the buffer back.
After marking the buffer and cycling the rifle several dozen times, the buffer rotates counter clockwise bit by bit with each cycle.
Makes me think that the damage happened all at once (?) Otherwise, it would be evenly distributed along the rim of the buffer. Does that sound logical, or am I missing something?
Every one of a few dozen AR15 pattern rifles I have had apart after some number of rounds fire has had dinked up edges. It never seemed to cause a problem; the buffer head is relatively soft metal so any burrs raised seem to just get bashed off.
Actually, I did have a generally troublesome receiver extension that also resulted in a really bad dink while I was clearing the issue, and that had to be hammered out. That was like 6,000 rounds ago in that gun.
Actually, I did have a generally troublesome receiver extension that also resulted in a really bad dink while I was clearing the issue, and that had to be hammered out. That was like 6,000 rounds ago in that gun.
I like the idea.
I'm not worried if it is causing problems, but whether, if it is an indicator of some underlying problem.
With that many rounds I would just keep an eye on it. It's probably nothing, maybe some debris got on the back of the carrier or something. If it was something out of spec I'd expect much more wear around the entire edge of the buffer with 500 rounds fired.
There is no damage, it is two pieces moving. Eventually the wear pattern stops, by then it will probably be a complete ring around the buffer head. Some BCGs assign more wear than others, but again, it is a non issue. No one has worn out a buffer.
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