05-08-2015, 10:23 PM
lawndartmike Wrote:The depression on the side of the bolt is there to help you push the bolt closed. A design throwback to before the FA.I've read of people using that depression on the bolt carrier to push the bolt closed, but I don't know if that was actually a design purpose.
AFAIK, the only reason for the carrier to have that portion milled out is to interface with the protuberance in the middle of the dust cover, the depression providing clearance for that part when the cover is closed, and forcing the cover open when the weapon is fired or the bolt is manually retracted.
