CMMG Resolute MK57 lower group in Armor Black with a mil-spec trigger, built on the MK57 AR-pattern platform for use with 5.7x28mm configurations. This style of lower group is designed for a dependable fit and function with an AR-style lower receiver and standard lower-group controls.
Key Features
Mil-Spec trigger setup for a familiar AR-style feel and function
MK57 AR-pattern lower group platform for 5.7x28mm builds
Armor Black hard-use finish for a durable, low-glare appearance
Forged aluminum construction for strength and rigidity
Upgrade your build with a CMMG Resolute MK57 lower group and mil-spec trigger in Armor Black for a clean, dependable foundation.
