Advanced Armament Corp Micro 7 Bolt 300 AAC Blackout has a lightweight 16" barrel with a 1:8 twist and has been nitride for extreme hardness and longevity. It has a weather-proof, black synthetic stock and an AAC adjustable cheek piece. The muzzle is threaded (5/8-24) to be compatible with sound suppressors, and an AAC Thread Protector is included. The Bolt 300 Blackout has an X-Mark adjustable trigger. The AAC 20 MOA Picatinny scope mount is pre-installed using the same strong torx screws found in the US Army's M24 sniper rifle.