[Review] CMMG 5.7x28MM Upper: Resolute 300 MK57 - Pew Pew ...
CMMG does make smaller 5.7 conversions, down to the 5” Banshee, but I wanted the big boy. I got the Resolute 300 MK57 upper. It has a 16.1” 416SS barrel, forged receiver, CMMG handguard, and an ambi-charging handle that I genuinely like.
DA: 78 PA: 30 MOZ Rank: 56