Adams Arms AARS in .300 Blackout with adjustable gas system and NiB-X piston, the suppressor-ready variant of the company's premium ambidextrous duty rifle. The adjustable gas block is factory-set for unsuppressed but includes a second setting for suppressor use. Type: Rifle Action: Semi-Automatic Caliber: .300 BLK Capacity: 30 Year introduced: 2018, USA Weight: 108 oz Overall length: 32.5" Status: Active Intended use: Suppressor Host, Home Defense, Law Enforcement