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Posted: 10/12/2015 7:26:38 PM EDT
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This isnt normal is it? Its got about 2K rounds on it. The back of it looks normal, a little discolored from use, but good overall. Let me know what else anyone wants pics of to help diagnose.   |
Dents on the face of the buffer are being created upwards from the buffer retaining pin as it lock over the face on buffer insertion to the tube, and you just suck at putting the buffer back in the tube after it has been pulled for cleaning.
Not sure where the buffer came from, but looks to not be anodized correctly, and maybe even made out of the wrong/softer aluminum as well. |
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Quoted: Dents on the face of the buffer are being created upwards from the buffer retaining pin as it lock over the face on buffer insertion to the tube, and you just suck at putting the buffer back in the tube after it has been pulled for cleaning. Not sure where the buffer came from, but looks to not be anodized correctly, and maybe even made out of the wrong/softer aluminum as well. |
| Shotgun the upper and take a shot of the rear of the BCG to see how far it sticks out from the upper. The only thing that I think could make those dents is the buffer retaining pin hitting the face of the buffer while cycling. Once you close the upper, the rear of the BCG should come in contact with the face of the buffer relieving the retaining pin and they should both continue to stay attached while cycling. Thing is, from those pics, it looks like the dents were made with a single impact, not numerous impacts like when you shoot a couple thousand rounds through it. Did you at any point run that buffer on a different lower? Lend it to a buddy for testing? Used that lower on a different upper? |
# 1 is buffer retainer tagging the buffer from the buffer pin channel being too far back in the lower receiver. With over 200 rounds on the buffer, if the buffer was not being pushed back way from the buffer retaining pin when the upper is locked down by the back of the carrier, the denting would be around 200 dents instead. So again, what I am seeing is just the buffer retainer pin coming up and mar'g the buffer edge when the buffer is remove and reinstalled, or the buffer pushed back and allowed to spring forward hard with the upper open to really tag the hell out of the buffer retaining pin instead. FYI, #2 is ridges around the back of the carrier. #3 is a bur on the back of the carrier at the bottom U slot that is scrapping down the face of the tube when the upper it being locked home. And yes, the buffer was produced out the wrong aluminum that was too soft to begin with, and the reason that is all peen to hell very easily to begin with. Quick guide to aluminum, http://www.onlinemetals.com/productguides/aluminumguide.cfm |
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Quoted: http://i81.photobucket.com/albums/j226/Dano523/bufferfacemarkedup.gif?t=1241927061 # 1 is buffer retainer tagging the buffer from the buffer pin channel being too far back in the lower receiver. With over 200 rounds on the buffer, if the buffer was not being pushed back way from the buffer retaining pin when the upper is locked down by the back of the carrier, the denting would be around 200 dents instead. So again, what I am seeing is just the buffer retainer pin coming up and mar'g the buffer edge when the buffer is remove and reinstalled, or the buffer pushed back and allowed to spring forward hard with the upper open to really tag the hell out of the buffer retaining pin instead. FYI, #2 is ridges around the back of the carrier. #3 is a bur on the back of the carrier at the bottom U slot that is scrapping down the face of the tube when the upper it being locked home. And yes, the buffer was produced out the wrong aluminum that was too soft to begin with, and the reason that is all peen to hell very easily to begin with. Quick guide to aluminum, http://www.onlinemetals.com/productguides/aluminumguide.cfm |
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Quoted: Your more than welcome to link this thread to GD, but even with a gun to my head, not way in hell that I'm venturing into the GD forum to even start with. Hence if you haven't figure out my sig line yet, it all about the GD forum. GD isnt so bad once you get your toes wet  |
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