Item: Black XASR-3100 / Desert XASR-F3100 

• Super Low FDE Extremely Accurate w/ Full CNC Machined
• Anti-Retreat Pin
• Ring Diameter: 30mm
• Overall Length: 144m / 5.7"
• Overall height: 48mm / 1.9"
• Mount Length: 144mm / 5.7"
• Ring Width: 45mm / 1.8"
• Central Height: 28mm / 1.1", bottom to center
• Ring Length: 26mm / 1.0"
• Gap Length: 63mm / 2.5"
• Material: 6061-T6 aluminum alloy
• Weight: 127g / 4.5oz
• Mount: 11mm dovetail
• Screws per ring: 6