I have scoured the site trying to find information regarding the value of purchasing a full auto BCG for a semi AR.  The only information i could find was a phrase that said the full auto carrier has more weight in the back and will cycle smoother.

I run a bravo company upper with 1/7 twist, chrome lined barrel, m4 feed ramps and a LMT bcg.  I am buying a second LMT bcg to take with me for 3 days of training.  Both bolt carriers groups are the same price.  Which would you go with and why?  

Thanks in advance for your answers.  And, if there is a thread about this somewhere else, thanks in advance for pointing me in that direction.  I did look in the FAQ section and did not find anything there.

For the same price I would get a full auto BCG.
I would get a BCM, DD, or Spikes.

A FA BCG is a tiny bit heavier, which makes it a tiny bit more reliable.

The lower weight of the Semi-auto BCG's reciprocating mass will reduce recoil a tiny bit, but at the expense of a tiny bit of reliability.

I find whatever type of BCG you use is irrelevant, since most people play around with their buffer weights anyway.








 

I gotta agree. I started with an H2 and moved to a standard buffer because it didn't have enough power to cycle the rounds with low power ammo like wolf.  My build has a standard buffer and an auto carrier, which seems like the best all around combination.

The weight difference between the F/A carrier and the "enhanced" S/A carrier is ~0.3 oz.

That said, if they are the same price, get the F/A carrier.

If a M-4, I find going to at least the 'H' buffer to be of benefit when firing full power 5.56 loads.

BCM is what I use

I,m thinking of looking into trying a DD BCG myself––I,ve heard the Quality is Excellent

Thank you all for your input.  
Looks like I will go with a FA bcg.  I will run a standard buffer and if there are any issues, switch to an H buffer if the load i have isn't working out.  Since it is a 1:7 twist, i usually shoot  62 grains and higher.  It is a 5.56 chambering, so i do shoot NATO loads on occaison.  It seems to make sense to get the FA bcg and then have several buffer weights available if necessary.

Another angle to this is in the event you ever go to Class III lower you will have all your uppers laying around ready to rock.

Yeah I keep an H in my range bag just incase.

Why use full-auto carrier...because thats what the rifle was designed for..when you get a chance get an un notched hammer and the feeding cycle getsa bit smoother.