BLACKHAWK, Omnivore Surefire X300A Multi-Fit Holster, Surefire X300A, Belt Holster, Left Hand, Black/Tan, Fits More Than 150 Styles of Semi-Automatic Handguns with Accessory Rail, Hard, Thumb Activated Retention MechanismMultiple holsters for multiple handguns is no longer an issue. The Blackhawk(R) Omnivore(TM) is a multi fit holster that accommodates more than 150 styles of semi automatic handguns with an accessory rail. The active retention mechanism locks onto Blackhawks proprietary Rail Attachment Device, not the frame of the handgun. A thumb release disengages the locking mechanism when drawing the handgun. Features : Level 2 Retention Uses two features to hold