The AD-T1-L mount is designed for the Aimpoint T1/T2/H1 Micro and is the lowest mount American Defense offers. Centerline height with the T1/T2/H1 Optic is .88"". This mount also fits the Vortex SPARC"" SPARC AR"" Vortex Spitfire AR and Primary Arms Micro Dots ** Optic Must Have A Removable Factory Base**. It is precision machined from 6061 T6 aluminum and finished in hard coat T3 Mil-Spec anodize. It features the Patented QD Auto Lock(TM) Lever system to accommodate both in spec and out of spec rail systems.