Vector Optics ACD Mount Ring 25.4mm Tube 6063-T6 Matte w/ Offset Level Bubble & Compass Black. This mount by Vector Optics is made to be use with real fire arms so you can be sure that it is made for your weapon model. The Vector Optics ACD Mount Ring & Universal Bubble Level includes an anti-cant device that keeps the bubble at the correct angle for level shooting. The Vector Optics ACD Mount Ring & Compass is made of 6063-T6 aluminum which ensures the stability and durability you need for your firearm. This Vector Optics ACD Mount Ring & Universal Style Bubble will level your rifle and make it easier for you to shoot perfectly every time. Specifications for Vector Optics ACD Mount Ring w/ Offset Bubble Level & Compass: Manufacturer: Vector Optics Color: Black Finish: Matte Fabric/Material: 6063-T6 Aluminum Attachment Type: Weaver Picatinny Width: 0.5 in Condition: New Mount Type: Weaver Ring Quantity: Single Features of Vector Optics ACD Mount Ring w/ Offset Bubble Level & Compass Anti Cant Device mount designed for real fire arms Universal style bubble at any direction Build-in compass Package Contents: Vector Optics ACD Mount Ring w/ Offset Bubble Level & Compass Hex Key Vector Optics SCACD-06: ACD Mount Ring 25.4mm Tube 6063-T6 Matte w/ Offset Level Bubble & Compass Black