Tnw aero survival rifle 10mm 16" tb 30rd aero grey FEATURES:-Famous for its removable barrel & easily convertible caliber changes-Caliber: 10mm-Barrel: 16.25"-Twist: 1:16"-Overall length: 29.5"-Weight: 5.5 lbs Other Features: Uses glock style magazines, quick change takedown barrel, ar style collapsible stock, does not include scope, threaded barrel 9/16-24 made of machined aircraft aluminum