The HK MP5 A5 Semi-Automatic Rifle is the classic configuration of the MP5 submachine gun developed in the mid-1960s. The HK MP5 A5 Semi-Automatic Rifle in .22 LR is manufactured exclusively by Walther under license from HK, making it the only genuine HK tactical rimfire replica available in the world. Every Walther MP5 features a NAVY pistol grip, a standard forearm, and a compensator just like those found on the original. The buttstock is retractable for comfort adjustment. The HK-style front post sight is adjustable for elevation and the rear sight is adjustable for both windage and elevation. Additional features include: a metal receiver, a bolt catch, and authentic sling attachment points.