Polymer Red Dot Optics Cut Level II OWB Holster | 1911 .45 ACPThis Thumb Release OWB Holster is custom for Colt Kimber Springfield S&W Ruger Taurus Rock Island and More 1911 . 45 ACP Pistol No Rail; THUMB LOCK & RELEASE Thumb release provides you with a quick access Level II retention prevent others except the wearer from drawing the locked pistol Red Dot Sight Optics Cut This outside the waistband pants holster accommodates variety of red dot sight optics, compatible with all standard optics such as Romeo Zero