• Adjustable Length Allows for Comfortable Eye Relief, Improving Shooting Accuracy

• Additional 0.3, 0.65, and 1.65 inch for Forward Extension to Customize Eye Relief

• 38mm/ 1.5in Bottom to Ring Center, Extremely Accurate and Stable w/ Full CNC Machined

• 21mm Picatinny Mount with Two Crossing Bolts & Anti-Retreat Bar for A Secure Attachment

• Ring Diameter: 30 mm
• Overall Length: 139 mm / 5.47 in
• Overall Height: 62.0 mm / 2.44 in
• Ring Width: 45.5 mm / 1.79 in
• Central Height: 38.0 mm / 1.5 in, Bottom to Center
• Gap Length: 73 mm / 2.87 in
• Material: 6061-T6 Aluminum Alloy
• Weight: 154 g / 5.43 oz
• Mount: 1913 Picatinny
• Finish: Black
• Screws per ring: 4 (M4 x 9mm)
• Mount Material: 6061-T6 Aluminum Alloy
• Items in the Package: Hex Key, T15 Torx Wrench and T20 Torx Wrench, etc.