If you have bought some new GHK AK Gas Magazines, have you encountered that the BBs won't fit at the lip of the mag? If yes, here's a video made by Team Blacksheep for you to do your own fix to the magazine as the lip is too tight or narrow for the BB to go through and that can cause potential damage to your magazine. Follow the tip closely and get the tools required to get the fix done.

Another release from Magpul PTS with this AK Magazine licensed from US Palm... "The US PALM® AK30 Airsoft Magazine is designed to be utilized by an operator in any condition. The aggressive ridges on the front and rear allow a positive purchase when seating the AK30 into the rifle. The deep waffle pattern on the magazine sides assist in rapid extraction from magazine pouches, and 100% positive manipulation within conditions beyond extreme.