Memories with the 20" A2

[Paulinski]

I don’t know about colt by CMMG advertises 20" barrels with M4 extensions. Speaking about M4 extensions how many early A1 (SP1), and then later A2’s worked fine with rifle feed ramps

[9sigman45]

@M4arc

This may be a dumb question but do the standard 20" rifles have M4 extensions these days or are those limited to the carbines?

I think SDI offers a 20" barrel with M4 feed ramps. I’ve considered getting one.