Proprietary and exclusive 7.62 x 54R magazine for Archangel® OPFOR® AA9130 stock
Magazine body Constructed of our legendary high strength, carbon fiber and glass reinforced black polymer
Injection molded magazine follower
Magazine spring formed from heat treated chrome silicone wire
Made in USA
FITMENT POSSIBLE ISSUES:
The problem with a magazine that can not be inserted, appears quite often. There are several reasons, but besides the fact that some magazines themselves are not always the same size, and unfortunately there are no others, since Promag is the only one who makes them.
The Mosin rifles themselves are very different due to the fact that they were made by a huge number of factories.
The issue, most likely, in the abutment of the magazine against the cutoff reflector. The magazine itself needs to be trimmed as it shown in the photo attached.
But it is VERY STRONGLY recommended pruning in increments of no more than 0.25 mm, and after pruning, try to see if the magazines latches. The fact is that there are rifles on which you do not need to cut anything at all, but there are those that need to be cut by 4 mm.