Indestructible Rifle

AKM’s Receivers are  stamped from a smooth 1.0 mm (0.04 in) sheet of steel. Further, compared with the AK 47 where the receiver was machined from heavier gauge steel. A rear stock trunnion and forward barrel trunnion are fastened to the U-shaped receiver using rivets. Receiver housing also features a rigid tubular cross-section support that adds structural strength. Guide rails that assist the bolt carrier’s movement which also incorporates the ejector are installed inside the receiver through spot welding. As a weight-saving measure, the stamped receiver cover is of thinner gauge metal than that of the AK-47. In order to maintain strength and durability it employs both longitudinal and latitudinal reinforcing ribs.