LaRue Tactical OBR Optimized Battle Rifle QD Scope Mount 30mm Black. The height is set for 1.535" above the rail for perfect alignment with weapon-mounted clip-on night vision devices. There is zero built-in cant to ensure perfect centerline alignment (the OBR rifle has 20 MOA built-in to the upper rail). The LT-111 will also accommodate the US Optics T-Pal with it's larger turret body. The generous 2.9" ring spacing accommodates large turret blocks with ease. The LT111 comes complete with spare mounting screws with wrench QD adjustment wrench and Instructions. Specifications for LaRue Tactical OBR Optimized Battle Rifle QD Scope Mount: Manufacturer: LaRue Tactical Color: Black Condition: New Package Contents: LaRue Tactical OBR Optimized Battle Rifle QD Scope Mount LaRue Tactical LT111-30: OBR Optimized Battle Rifle QD Scope Mount 30mm Black