MICRO MOUNT The Centurion Arms, LLC Micro Mount is designed to securely mount a variety of popular optics to your flat-top upper receiver including Aimpoint's Micro R-1, H-1, H-2, T-1, T-2, Vortex's Sparc I & II, Primary Arms Micro Dot & Advanced Micro Dot, Holosun Technologies HS403, or any other optic utilizing the same type of mounting interface. Offering Absolute or a Lower 1/3 Co-Witness with your back-up iron sights, this mount is ideal for shooters who are looking for one of the strongest mounts available to secure their optics. FEATURES- Absolute or lower 1/3 co-witness - Recoil lug interface between mount and optic - Mounting bolt is a standard 1/2in and has a coin slot for easy mounting and removal. MATERIALS & CONSTRUCTION - Precision CNC machined from Aircraft Grade 6061-T6 Aluminum - Military Specification Type III Hard Coat Anodized - Lower 1/3 spacer manufactured from a lightweight magnesium alloy - Weight: 1.3oz , with spacer 1.6oz - Made in the USA!