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Thread: Affordable nitride BCG's
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15 July 2016, 23:10 #31
Just curious. My CMT's were very tight at first to the point if you rode the charging handle in it would stop before the F/A would even catch. They broke in very quickly and feel perfect after 1st. use. I can try a Fathom enhanced in my San Tan tomorrow.
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16 July 2016, 00:43 #32
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16 July 2016, 07:21 #33
Just the photo or does that staking look different? Press points look narrow and crisp.
Should probably grab a few of these.
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16 July 2016, 08:01 #34
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16 July 2016, 08:51 #35
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17 July 2016, 08:43 #36Senior Member
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This staking is adequate to serve the purpose staking is intended to serve. Any other variation thereof, is simply aesthetic. What is NOT acceptable, is when staking is performed with an impact tool of any sort, whether or not this is in the TM, I am unsure, however, this is NOT how Colt stakes an M4 BCG.
This appears to have been properly done via compression, as best I can see. When an impact tool (hammer, chisel, whatever) is used, the shock and side-impact can snap the gas-key bolts, which are under tension as they are tightened to roughly 56 inch-pounds, which is honestly quite a good bit for a fastener the size of a gas-key screw, and is part of why the spec for them is so stringent. Regardless, side-impact/shock can and does break these, and you find out about it many rounds later, as the head of the bolt is held in place by the staking, sometimes.Last edited by JGifford; 17 July 2016 at 08:52.