This is the factory 4 round magazine for the Mauser M12 and M18 rifles.
The size A magazine fits the following calibres:
- .300 WM
- .338 WM
- 7mm RM
Manufactured from tough reinforced black polymer with a double stack feed and a stainless leaf spring they are an excellent design.
Also fits the Sauer 100 and Sauer 101, the only difference is the Mauser magazines have a Mauser logo on the base plate.