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HiBC · December 3, 2008, 03:37 AM

Hold off on the silicon!
Its like that because it is supposed to be.
The M-4 discovered a problem called bolt bounce and that little shuffle is part of dampening it,as I understand.
See the book "Black Rifle 2"They talk about buffers.Likely yours is marked with an "H" or maybe even "H2"
If it works,don't fix it :-)

December 3, 2008, 03:37 AM	#4
HiBC Senior Member Join Date: November 13, 2006 Posts: 8,283	Hold off on the silicon! Its like that because it is supposed to be. The M-4 discovered a problem called bolt bounce and that little shuffle is part of dampening it,as I understand. See the book "Black Rifle 2"They talk about buffers.Likely yours is marked with an "H" or maybe even "H2" If it works,don't fix it :-)