5/25/2023 0 Comments Semi vs full auto bcgI did end up buying a new BCG for my AR that had this full cut bolt carrier but since this particular AR has no lower receiver block everything works fine. ![]() ![]() My question is if I have a full cut bolt carrier will all the rest of the parts (bolt, firing pin, etc.) exchange with parts from a full auto BCG or did Colt modify those parts in some way also. Seems almost everyone has gone this way and the half cut AR15 BCG are harder and harder to find although they also won't work in a lower with a block installed. I know Colt is now supplying the full-auto BCGs. These blocks then necessitated the rework of the BCG so that it had a full cut along the bottom so the bolt would cycle in a lower that had the block installed. ![]() The article said that that was the reason for the installation of the lower receiver blocks. Read an article that said in the mid-1990's Colt was OVERLY compliant in their interpretation of not having their ARs being able to be illegally converted to full auto.
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