The 1791 Ultra Custom Light Bearing holster with Memory-Lok technology allows for a customized fit with Kydex like retention with the comfort of leather. The Ultra Custom comes with an innovative design that allows you to use rail-mounted accessories like larger lights and lasers. Once you receive it, follow the instructions, and mold the Memory-Lok Leather to a full custom fit for your firearm. You can't get any more custom than that. Compatible with 1911 3"; Bersa Thunder 380; Glock 42, 43, 43X; Kahr CW45, K9; Kimber EVO, Micro 380, Micro 9, Ultra Carry, Ultra Raptor ii; Ruger LC9, SR22, SR1911; Sig Sauer P238, P365, P365XL, Ultra Nitron; Springfield Hellcat; Taurus GX4; Walther PPK and similar frames with most rail mounted lights.