GLOCK 20 MAG EXTENSION 10MM
The hardest part of installing these magazine extensions is getting the magazine base off. Large Frame Glocks are MUCH harder than any others. Once I got the base off and removed the spring and follower, the new internals went right in . The fitting of the magazine extension requires a a degree of physical dexterity but nothing to break a sweat over. Once installed, they are solid and don't "pop off" if dropped with a full magazine. I like them and believe it is money well spent for the extra capacity and "style".