03-02-2021, 03:24 AM
TruLbrt Wrote:Try a tight fitting upper instead. I will select the tightest out of several, and leave looser ones for 5.56/300.
Aero M4E1 threaded uppers have been the tightest thus far.
Then you haven't been trying the really tight ones, that require thermal fits like BCM, VLTOR, Noveske or JP Enterprises.

