The Patent Pending Arisaka Aimpoint Acro Mount is designed for the Aimpoint Acro P-1 and P-2 optics. The low profile, minimalist design and 7075-T651 aluminum construction with MIL-A-8625 Type III hard coat anodizing ensures strength and durability. The Arisaka Aimpoint Acro Mount is available in 1.70" and 1.93" heights, and with black or clear (tan) hard coat anodizing. Why does Arisaka offer 1.70"? Many people find this height provides the perfect balance between heads up orientation and enough cheekweld to be consistent, which is evident in the rising popularity of 1.70" scope mounts. Weight: 1.70" - 3.0 oz 1.93" - 3.1 oz Mfg: Arisaka Defense