Don’t build a .22 LR that looks like an AR build an AR that happens to be chambered in .22 LR. Equipped with a 4.5 barrel the shortest CMMG offers in any caliber this BANSHEE upper group is built on the Mk4 platform and is designed to work with any standard AR15 lower group and use our .22 AR Conversion Mags. Available in six different Cerakote finishes all CMMG Upper Groups come complete with bolt carrier group and ZEROED accessories including: – ZEROED AR15 Polymer Dust Cover – ZEROED .22LR Ambi Charging Handle – ZEROED .22LR Flash Hider – Platform: Mk4 – Caliber: .22 LR – Operating System: Traditional Blowback – Barrel Length: 4.5 – Barrel Twist: 1:16 – Barrel Contour: MT – Barrel Material: 4140CM SBN – Muzzle Device: CMMG ZEROED Flash Hider – Muzzle Thread: 1/2 x 28 – Upper Receiver: Billet 6061 T6 Aluminum – Hand Guard: CMMG EML4 M-LOK – Finish: Cerakote Standard – Charging Handle: CMMG ZEROED Ambi – Weight: 2.2 lbs – Length: 12.8