The Q LLC Sugar Weasel Complete Upper is a high-performance 300 Blackout assembly designed as a direct replacement for the Sugar Weasel platform. It features a 13 threaded barrel with a fast 1:6 twist rate and a tapered muzzle for superior suppressor alignment. This unit is equipped with a Matte Black and Tan finish and utilizes a pistol-length gas system with a Q adjustable gas block for fine-tuning subsonic and supersonic loads. Complete with a bolt carrier group, this upper provides the signature performance and reliability found in Q's specialized firearms. Note: The fast 1:6 twist rate is specifically engineered to stabilize heavy subsonic projectiles, providing exceptional accuracy when shooting suppressed.