Ha, I'm using a keepshooting mag adapter to fit my keltec, makes it 15 shots, works great..The old promag mags [30rd] I bought for my Mini-14 had to all have the holes redone to fit and shoot right..I used the famous demil tool to cut the hole slots...The 10 shot mags I had for that rifle were bushmaster, and cut and pinned to meet the 10 shot reg..They were crap....one never worked???Most of the time if jamming a little shot of silicone lube will help them slide and load....