Fits 30 round curved magazine *** - Arms Republic Stribog Mag Extension 5 Round

I bought one to try since they were discounted, but I wasn't actually sure if they'd fit the curved mags. The description on Arms Republic's website, and most other locations say it only fits the old straight magazines, but the pattern looks the same. I was able to fit it on my curved mag with a rubber mallet, and the retainer pad fits in perfectly. However, you won't be able to lock down the screw on the curved mags without grinding off a bit of the plastic on the back of the magazine; the hole is just too close to the plastic on the magazine to actually screw down. You can grind off a bit of the plastic just at the bottom just to tighten down the screw (which is what I did).

Fills to 35, and the last few rounds feed (using dummy rounds), and the bolt locks back with the empty magazine in, so it passes the function test so far. Only tested at home with dummy rounds, but I assume it'll work fine next chance I get to test at the range.