Equipping a slimline Glock frame—such as the Glock 42, 43, 43X, or 48—presents a unique challenge for everyday carry concealment. Unlike full-sized frames that feature standard, wide cross-slot equipment tracks, the Glock slimline series features a narrow profile. This means standard universal compact lights will not fit without adding a bulky, aftermarket rail adapter key that ruins the slim profile of your carry setup.