CMMG Mk57 Lower Group Mil-Spec Trigger 5.7x28mm FN Armor Black Frame

Description

Product Overview

The CMMG Mk57 Lower Group is a dedicated 5.7x28mm FN AR-pattern lower receiver assembly designed for builds using compatible P90 pattern magazines. This Armor Black configuration includes a mil-spec trigger and the lower-group components needed to complete a compatible upper and lower assembly. It is supplied as a frame component rather than a complete firearm, so barrel, sights, and overall firearm dimensions depend on the upper assembly selected for the build.

Key Features

• Dedicated 5.7x28mm FN lower configuration for compatible AR-pattern builds
• Compatible with CMMG Mk57 and FN P90 pattern magazines
• Mil-spec trigger provides a familiar, service-style trigger configuration
• Armor Black finish offers a durable factory appearance
• Frame-only configuration allows the builder to select a compatible upper assembly and barrel length

Choose the CMMG Mk57 Lower Group as the foundation for a compatible 5.7x28mm FN build.