Following the adoption of the Sig Sauer P320 as the M17 and M18 by the US military shooters all over have been asking for a pistol caliber carbine that uses P320 mags. Not only can you switch magazines from BANSHEE to handgun seamlessly you also retain full AR15 functionality in the Mk17. - Available in a variety of cerakote finish options the BANSHEE series represents the most innovative AR pistols and SBRs available today. From the quick deploying RIPBRACE� to the stylized receivers and EML handguards every BANSHEE is tailor-made to be the personal defense weapon you can always depend on. With full length M-LOK� slots on both sides and the bottom of the handguard as well as M-LOK between the top picatinny rail sections you'll always have enough space for those must have accessories. - Platform Mk17 - Caliber 9mm - Operating System Fixed Ejector Radial Delayed Blowback - Barrel Length 8 - Barrel Twist 1:10 - Barrel Contour MT - Barrel Material 4140CM SBN - Muzzle Device CMMG ZEROED Linear Comp - Muzzle Thread 1/2 X 28 - Upper Receiver Billet 6061 T6 Aluminum - Lower Receiver Mk17 Forged 7075 T6 Aluminum - Hand Guard CMMG EML7 M-LOK - Finish Cerakote Standard - Charging Handle CMMG ZEROED Ambi - Pistol Grip CMMG ZEROED Pistol Grip - Buffer Type Carbine - Receiver Extension CMMG 6 Position Fastback Extension - Stock / Brace CMMG RipBrace - Trigger Type ZEROED Drop-In Single Stage - Trigger Guard Integrated - Safety Selector CMMG ZEROED 60/90 Degree - Magazine Sig Sauer P320 21rd - Weight 4.9 lbs - Length 23.7