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 cant get any more custom than that. Fits- 1911 Officer with Rail; Glock 17 19 19x 23 25 26 27 28 29 30 32 33 45 48; FN FNS-9; Ruger Max 9 SR9 SR40 SR22; S&W MP9 MP40 MP40c Shield 5903; Sig Sauer P225-A1 P228 P229 P229c; Springfield XD9 XD40 XDS XDE; Walther P99 P22 PPS CCP; Taurus PT111 G2 G2c G3 G3c 709 Slim and similar frames with most rail mounted lights.