I know this has been addressed here before(I could not find it) so I apologize, but there are new people here so...What are the differences/advantages of a FA BCG vs a SA BCG, as I'm thinking of using one in my BRO build.

An M16 BCG was what the AR15 was designed to use. It is a little heavier than the semiauto BCG and will increase lock time. The M16 bolt carrier shrouds the firing pin. I can't think of a disadvantage of using an full auto BCG.



TS

I cannot think of any either TS, some people actually complain about the .5 sec or less cycle time from the FA BCG. \
I run all FA BCG's in my rifles also since I feel they are more dependable in the cycle.

The FA BCG was the type designed for the AR.

The SA BCG was just supposed to be a stop gap measure to stop illicit conversion to FA. Soon enough the big makers changed the lower to make this harder, but somehow the SA BCG stuck around.

It should have been dropped in the late 80's. When you change the weight and shape of a moving part it will never work the same as the original. Since the FA BCG already worked perfectly then any change is likely not to be beneficial.

there would be a minimal weight savings if you're trying to pull off a superlight by going with SA and going with everything else as light and minimalistic as possible, going for a hard battle rifle, go with the FA

A FA carrier can help with slowing harsh recoil in carbine length gas system rifles.

I run them in all my ARs.

Kelly which BCG's do you like the best?

I used to use LMT's in all my replacements, but when they became unobtainium last year, I went over to Bravo Company ones.

Yea same with me on the LMT's.
My Colts are Colts
DPMS are DPMS
LMT's in my LMT's
Spares are LMT's
but now my Piston Uppers have (1) Young Manufacturing M16 National Match and (1) M16 Chrome BCG by Young Manufacturing as well.

If you have not tried the national match BCG, pick you one up and give it a whirl that thing is a work of art and I wished I had a dozen of them.

I actually have a Young NM in my PWS piston'd FauxSBR (I reused a MSTN upper and the Young Carrier from a left over 6.8 upper that I had for the conversion). In a way I wish I had used a heavier carrier in the build up. It's still very shootable, but I think either a heavier carrier or a heavier buffer might be in order. I have an H buffer in there now, I might go to a H2 to see how it behaves.

This post has been edited by KellyTTE: November 7th 2009 5:44 AM

I run H buffers in all my guns as well.
The Colt, LMT's, and Daly came with the H buffer so I added them to my DPMS rifles.

Bravo Co is good stuff. Take a look at Spikes Tactical as well. I personally run Spikes BCG's with their St-t2 buffers.

If I am not mistaken, BCM uses LMT bolts. Though I just read a thread (either here or on another forum, cant remember) about LMT having some issues with their BCG's over the last year or so. It was regarding MIM (metal injection molding if I recall correctly) process. Had to do with MIM process causing brittle metal, which would break when the carrier key was staked to the carrier.