1. Top flat picatinny rails, other three sides key hole cutout

2 .Overall Length: 260mm (10.2 inch)

3. Weight (net): 420g 

4. Inside Dia 35mm (1.4 inch)

5 .Lower rail style with CNC procedure

6 .One piece style more accurate

7 Upper rail is extended over the barrel nut for a 'no-gap' monolithic look

8 Light weight in precision

9 Easy and quick installation

10. High quality aluminum alloy in durable mil-spec style black matte finish

11.With tools, 2 pcs 3" detachable picatinny rails 

12.Shock proof can be used on real fire caliber