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 CMMGoffers in any caliber, this BANSHEE(TM) upper group is built on the Mk4 platform, and is designed to work with any standard AR15 lower group and use our .22LR AR Conversion Mags. Available in different Cerakote finishes, all CMMGUpper Groups come complete with bolt carrier group and ZEROED(TM) accessories including:ZEROED AR15 Polymer Dust CoverZEROED .22LR Ambi Charging HandleZEROED .22LR Flash HiderLifetime Quality GuaranteeWe aim to please, that's why every CMMG product is backed by our Lifetime Quality Guarantee against material and workmanship defects. Learn More.