This is a Magpul Industries Magazine known as the PMAG chambered in 7.62X39, model MAG658-BLK.
The PMAG 20 AK/AKM MOE is an inexpensive" lightweight" high reliability 20-round polymer magazine designed for Kalashnikov pattern rifles in 7.62x39mm (AK-47" AKM" AKS" SIG556R" and others.) It features a removable floorplate" constant curve geometry" and a high-reliability/low-friction follower for the affordable performance you expect from a MOE PMAG. Made in U.S.A. Magazine counts as three US compliance parts for 922(r).
Features:
20RD capacity
Polymer construction
Anti-tilt, self lubricating follower
Ribbed gripping surface
Flared floorplate
Stainless steel spring