GG&G Accucam QD Base w/ 30mm Integral Rings For AR15. This dovetail scope mount is made with a height specifically designed to provide a proper cheek weld with the AR15/M16 weapon system. The integral scope rings on the GG&G Accucam QD Integral Ring Base for the AR are spaced at 4.400 inches center to center. The height from the top of the dovetail to the centerline of the ring is 1.400 inches. The GG&G QD Dovetail Scope Mount is designed and manufactured to meet the rigors of combat and professional use. Manufactured from solid billet 6061 T6 aluminum alloy and coated with a Type III hard coat anodized matte black mil-spec finish the GG&G QD Accucam Base w/ Rings is made to last All edges have been dehorned to protect the operator. The 30mm rings are an integral part of the base not machined separately and stuck onto it. The ring caps are held solidly in place with four socket head cap screws. The GG&G Accucam QD Scope Rings provide you with a solid method to quickly install or remove the mounting base from the weapon system. The 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 patented design allows you to adjust the tension to accommodate out of spec or worn dovetails. In tests the Accucam Locking Lever System has 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. GG&G rifle scope mounts are tested in the field and trusted by military and law enforcement personnel so you can count on your QD mounting base to work as promised under critical conditions. NOTE: not recommended for .50 BMG or lightweight machine guns. Specifications for GG&G QD Ring Dovetail Scope Mount Base for AR-15 / M-16: Material: 6061 T6 aluminum alloy Finish: Type III hard coat anodized matte black Fits: Weaver and MIL-STD-1913 dovetails Gun Model: AR15 Features of GG&G Accucam QD Base with Integral 30mm Rings: Scope base and scope rings in one unit Quick-detach lever allows removal of base rings and scope in seconds Adjustable for Weaver and MIL-STD-1913 dovetails Package Contents: GG&G Accucam QD Base with Integral Rings What firearm models does the manufacturer say GG&G Accucam QD Base w/ 30mm Integral Rings is compatible with? The manufacturer says that GG&G Accucam QD Base w/ 30mm Integral Rings is compatible with AR-15