Arisaka Defense Vertical Grip M-LOK Black. It features a radiused profile at the top which tapers to meet the mounting surface on the handguard giving a low-profile feel and ergonomic comfort. Twin mounting screws ensure secure attachment. The grip is hollow with no end-cap. The Vertical Grip is CNC machined from 6061-T6 aluminum and MIL-A-8625 Type III hard coat anodized. Requires a 3/32in Allen wrench for installation (not included). Made in specialized factories. Specifications for Arisaka Defense M-LOK Vertical Grips: Manufacturer: Arisaka Defense Color: Black Finish: MIL-A-8625 Type III Hard Coat Anodized Material: Robust Width: 1.3 in Height: 2.5 in Weight: 1.8 oz Mount: Screw Condition: New Last Chance: Yes Fabric/Material: CNC machined from 6061-T6 aluminum Attachment Type: Screw Country of Origin: USA Package Contents: Arisaka Defense Vertical Grip M-LOK Arisaka Defense VFG-M: Vertical Grip M-LOK Black