Licensed models are produced in many communist or former Soviet-aligned nations throughout the world. The AK uses the popular and successful design features described above of rotating bolt and fixed operating rod attached to the bolt carrier. The bolt has a single follower which engages a cam track in the receiver and a single locking lug. Most AK receivers are stamped and welded sheet metal with blued or painted finishes. The top cover is traditionally sheet metal.
Furniture is usually wood and sometimes plastic.
Frame parts at the front and rear of the receiver are cast or machined and riveted to the receiver. The AK bolt assembly is driven by a helical spring surrounding a rod attached to a removable carrier behind the bolt. The spring carrier also keeps the bolt carrier on guide rails in the receiver. That this is accomplished with two major parts groups and can be performed in less time than it takes to describe is a testament to the elegant simplicity of the design. The overall simplicity of the system also lends outstanding reliability in dusty or humid environments found in desert or jungle.