The Blackhawk Omnivore Rail Attachment Device mounts on your pistol’s Picatinny rail and secures the gun inside an Omnivore Non-Light Bearing holster. An active retention mechanism in the Omnivore holster locks onto the Blackhawk Omnivore Rail Attachment Device instead of the frame to hold the handgun in place. Easy to install – attaches with a few screws Mounts to most any accessory rail Detaches easily when needed Only works with Omnivore Non-Light Bearing holsters The Blackhawk Omnivore Rail Attachment Device fits on any handgun with at least one Picatinny rail slot - allowing the same holster to be used with different pistols.