What seemed strange on mine is the cut out is not as big as a normal SemiAuto BCG. From the pics posted showing the differance that semi auto bcg looks alot more cut out than mine? Thanks again.
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What seemed strange on mine is the cut out is not as big as a normal SemiAuto BCG. From the pics posted showing the differance that semi auto bcg looks alot more cut out than mine? Thanks again.
From the (really useful, thanks Troy!) pictures:
IIRC, the unshrouded firing pin was to foul the hammer if there was some halfassed attempt to make a homebrew 'full auto'. The half circle carrier was, as noted, meant to not trip an autosear.
Why the three variants of dimension on the bottom circle of the carrier has never made sense to me, but the largest one, it was argued, added mass to the carrier, which was a good thing.
For the OP, your somewhat reduced lower circle isn't apt to hurt anything; I'd just shoot it.
The other question was the origin of some of this stuff; whether to blame Colt management for being neurotic, or BATFE regulators, or some combination thereof, it's a good thing, at least for the moment, that we can use BCGs that haven't been neutered.
Moon
Exactly. It works in conjunction with the "notched" hammer. The small spool firing pin hangs up on the notch should the discontector fail or be modified to not catch the hammer.
Weight differences between standard carriers and relief cut carriers are negligible. All else equal a standard 16 carrier is preferrable. But I'd run the carrier that the OP bought without hesitation.
"You people have too much time on your hands." - scottryan
Mark, the 'notched hammer' thing raises its ugly head again. I've a 9mm AR, and was fortunately spared the notched hammer; my bolt is ramped, but there was a bunch of miserable stuff connected with earlier AR parts. I had forgotten that the notched hammers were also used in 5.56 versions, and I'm thinking my first (and now departed) post-ban AR had the unshrouded pin.
Do we know why manufacturers are now able to make mil-spec parts?
Thnx,
Moon
Last edited by halfmoonclip; 03-18-13 at 13:47.
"You people have too much time on your hands." - scottryan
mark, I took a beating (maybe over on the Colt board) for suggesting that any of the redundant protection against full auto conversion was Colt's doing, tho' I'd heard they had.
Anyway, happy to have avoided such things with rifles currently in my possession.
Moon
I successfully avoided those, but was cursed with the halfcircle, unshrouded firing pin BCG at one point. They were reputed to be a real stinker to remove without the right tools.
Any notion what, other than competition, led to Colt's change of heart?
Oh, we didn't even talk about the oversize FCG pins.
Moon
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