Cmmg Uppr Rslt Mk4 6mm Arc 16.1" Blk

The CMMG Uppr Rslt Mk4 6mm Arc 16.1" Blk is a purpose-built upper receiver assembly chambered in 6mm ARC, optimized for precision intermediate-range engagement and modern rifle platform modularity. The 16.1-inch barrel length balances velocity retention with handling characteristics critical for tactical applications, hunting, and precision rifle training where users require a compact, efficient platform without sacrificing ballistic performance.

6mm ARC delivers ballistic efficiency in a short-action cartridge, combining moderate recoil impulse with downrange energy retention superior to 5.56 NATO and 300 Blackout across mid-range distances. The 16.1-inch configuration maintains velocity while keeping overall system length manageable for vehicle operations, close-quarters work, and precision shooting disciplines. This upper receiver assembly integrates with standard AR-15 lower receivers, preserving platform interchangeability and allowing shooters to leverage existing infrastructure and ergonomic familiarity.

This configuration serves operators, precision rifle competitors, and hunters seeking a modern intermediate cartridge platform with genuine ballistic advantages over conventional 5.56 systems. The 6mm ARC upper receiver is particularly suited to precision work, long-range training evolution, and operational flexibility in load-out decisions. Operators can configure this upper for specific mission requirements—whether transitioning from patrol-weight 5.56 platforms to a dedicated precision upper or building a multi-caliber modular system.