ATI

This drop in ready upper receiver assembly features our patented reinforced Omni polymer hybrid upper receiver with a 16 HBAR profile barrel with 1:8 button cut rifling black nitride finish and chambered for .300AAC. Finished with a 10 free float key-mod rail system over a pistol length DGIS gas system and A2 style compensator. Compete with black nitride finished bolt carrier group. Fits to any AR-15 pattern lower receiver. - .300AAC Caliber - 16 HBAR Barrel with Black Nitride Finish - Patented Omni Hybrid Receiver - 10 Free Float Key-Mod Rail System - Low Profile Pistol Length Gas System (DGIS) - A2 Style Compensator - Black Nitride Finish Bolt Carrier Group