Why is there a diff in the mill work of these two lowers ??? one seems to be milled all the way back. and the other has a space in between
thanks guys
will not let me upload photos
It’s called a sear block.
what one is better to have pic 33 or 44 thought it sear block lol, just kinda escaped my mind
Both will be fine for a semi-auto rifle.
one if them is a BM lower the other a Colt 6920. can the one with the block take a F/A carrier
They both should be able to.
Either will work with a fa carrier, the one with the extra alum has a sear block. This is so you cant put a sear in it and make it a automatic …3 shot burst…etc. I’m going to guess the colt id the one with the seat block?
I imagine the one with the block is the Bushmaster.
Wrong it’s a Colt
Colt is the only one to ever do this PC crap
There is no “sear block” in either of those lowers. The Colt has less milling in the interior. But the sear block is a pinned part that sticks up out of the lower.
Doesn’t the sear block go right where that extra material is in that lower?
Correct.
He would need to run a half moon carrier if he had the super PC block.
For lack of a better term, I called it a sear block.
The unfinished milling makes it impossible to install an auto sear.
FWIW this is a sear block:
There is so much wrong with that picture!
:bad:
The orangy thingy behind the take down pin?!!?
That.
The sear block.
The pistol grip.
The sear block, yes. As for the pistol grip, cut the guy some slack. Maybe the owner has gorilla-like hands, and needs the extra reach.
I just swiped it from the net. Not my pic.
Thanks GUYS