American Defense Manufacturing AD-Etech Mount for EXPS3 EOTECH Flat Dark Earth AD-ETECH-R2 STD FDE-TL. Overall Length is 4.8". It also includes a built in small section of rail at the rear for NV or a magnifying optic. For Use With EXPS EOTech Optics/ Magnifiers with the built in QD Lever on the optic itself. Will work with EOTECH Factory Flip-To-Side Magnifier Mount with the spacer removed. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented QD Auto Lock Lever system to accommodate both in spec and out of spec rail systems. Specifications for American Defense Manufacturing AD-Etech-R2 Mount for EXPS3 EOTECH: Manufacturer: American Defense Manufacturing Condition: New Additional Features: Titanium Lever Package Contents: American Defense Manufacturing AD-Etech-R2 Mount for EXPS3 EOTECH American Defense Manufacturing AD-ETECH-R2 STD FDE-TL: AD-Etech Mount for EXPS3 EOTECH Flat Dark Earth