PROWIN GHK AKM magazines

[Kokanee]

Just switched over to PROMWIN mags for my GHK AKM and almost every round fired results in a bolt-partially-forward. I had this issue (but not nearly as bad, say every 70-80 rounds) but that was because my rear sight base was starting to wobble and I fixed it....

Anyone know the story on these mags, do they just need a work in period or are there mods that need to be made to the rifle to get them working properly? Thankfully all five I bought hold gas np.

[Kokanee]

Found a solution, had to mod the rifle as per this thread;

http://gasguns.info/forum/viewtopic.php?f=28&t=8358

Removal of the material highlighted in yellow;