GG&G Accucam QD Standard Base Rail MIL-STD-1913. This proprietary patented system uses the GG&G Accucam Quick Detach Locking Lever System to enable rapid attachment and removal of the mounting rail. The GG&G The Accucam QD Standard Base is five inches long with its rail manufactured to MIL-STD-1913. It adds 1/2 inch to the height of the mounting platform. The GG&G AccuCam Standard Base and Rail is designed and manufactured to meet the rigors of combat and professional use but is not recommended for .50 BMG or lightweight machine guns. This GG&G Scope Rail is manufactured from solid billet 6061 T6 aluminum alloy and has a Type III hard coat anodized matte black mil-spec finish. All edges have been dehorned to protect the operator. The GG&G Accucam QD Locking Lever Rail provides you with a solid method to quickly install or remove the mounting base from the weapon system. The scope base can be quickly installed on a dovetail rail in seconds by rotating the Accucam Cam Lever to the locked position. It can then be quickly removed by rotating the Accucam Cam Lever to the unlocked position. It is fully adjustable to fit Weaver and MIL-STD-1913 dovetails. The unique design allows you to adjust the tension to accommodate out of spec or worn dovetails. In tests the GG&G Accu-Cam Scope Base used in conjunction with GG&G Quick Detach Scope Rings has been shown to be repeatable to 1/2 MOA. The unique finger loop design is easily operated even with a gloved hand and the rounded design is ergonomic and virtually snag proof. The Accucam mechanism is manufactured from solid billet 4140 steel and manganese phosphated matte black per mil-spec. NOTE: this product is not recommended for .50 BMG or lightweight machine guns. Specifications for GG&G Quick Detach Scope Ring Mount: Material: 6061 T6 Aluminum Finish: Type III Hard Coat anodized matte black Fits: Weaver and Mil-Std 1913 Dovetails Features of GG&G Accucam QD Standard Base: Adds 1/2" height to mounting platform Quick-detach lever for easy fast removal of base Reliable return to zero on reinstallation Weaver / MIL_STD-1913 Dovetail rail Package Contents: GGG Accucam Quick-Detachable Standard Base and Rail