Great kit....for the aero epc lower!! - Aero Precision EPC Lower Parts Kit Minus FCG/Grip

As mentioned in a previous review, this kit does not come with the magazine catch/release...that's because it's made for the Aero Precision EPC (Enhanced Pistol Caliber) Lower. This lower takes Glock style magazines and has the magazine catch/release already built-in. All you have to do is pay attention to what you're buying and that will solve 99% of your problems.