Complete upper receiver assembly dedicated rimfire conversion upper in 22 LR that is ready to install on any standard AR lower with small pin lower receiver. It features a true 22 LR chamber and correct 1 in 16" rifling twist bull barrel w/target crown. Equipped with a Flat-Top Picatinny Rail for mounting optics. Compatible with Black Dog Machine and CMMG magazines. Includes Tasco 4-16x40 scope, 1x10 Round and 2x15 Round Black Dog Magazines.

Well under 500 rounds through this upper. 

Message through Nex-Tech.