CAT Devices Gen3 Duty Magnetic Mounting System Adapter Plate HK USP RMS Black. Engineered for professional reliability it allows single-time calibration ensuring consistent zero every time the optic is mounted. The GEN3 DUTY version features an additional safety pin retainer mechanically locking the plate in place so it cannot detach or fly off providing maximum security for duty defensive and professional use. The CAT Device GEN3 DUTY represents the next evolution in pistol optic mounting technology combining an innovative magnetic attachment system with a mechanical safety solution engineered specifically for professional and duty applications. Designed to deliver speed reliability and repeatable accuracy the GEN3 DUTY allows shooters to mount and remove their optic in seconds without tools without permanent firearm modifications and without compromising the stability required for serious use. Specifications for CAT Devices Gen3 Duty Magnetic Mounting System Adapter Plate: Manufacturer: CAT Devices Fabric/Material: Aluminum Color: Black Weight: 2.42 oz Features of CAT Devices Gen3 Duty Magnetic Mounting System Adapter Plate Magnetic Red Dot Mounting System Pin retainer for extra lock Package Contents: CAT Devices Gen3 Duty Magnetic Mounting System Adapter Plate Allen key Rear sight Pin retainer What firearm models does the manufacturer say CAT Devices Gen3 Duty Magnetic Mounting System Adapter Plate is compatible with? The manufacturer suggests that CAT Devices Gen3 Duty Magnetic Mounting System Adapter Plate is compatible with Heckler & Koch USP Glock 19 Glock 23 Glock 17 Glock 22 Glock 45 Glock 43 Glock 43X Glock 48CAT Devices CATMM3HK01: Gen3 Duty Magnetic Mounting System Adapter Plate HK USP RMS Black