Built around an Armory USA "AUSA" model stamped sheet metal receiver, this rifle was built by Piece of History Firearms of Tucson, Arizona as a semi-automatic copy of the AKS-74U sub-machine gun. Also known as the "Krinkov" or "Krink" in the States. The 74U was designed as a compact counterpart to the full-sized AKS-74, intended for use by rear-line units, vehicle crews, paratroopers, and special forces, essentially filling the "personal defense weapon" niche, before said niche had a name. Post front and 2-leaf rear sights, with the distinctive pressure booting muzzle device/flash hider, smooth forearm, hinged top cover, checkered grip and side-folding stock. The trunnion is Russian marked, with cosmetic 3-position markings/notches for the selector, an assembly number "2609" on the 74U components and the manufacturer markings on the underside behind/beneath the grip.