Constructed for Smith & Wesson Shield / Shield Plus and Slimline Glock 43X MOS / G48 MOS; Fits Holosun 407K / Holosun 507K optics; Crafted from 6061-T6 Aluminum hardened with type III anodizing for increased corrosion-resistance; Proudly produced here in the USA; Created with precise tolerances for a perfect fit; Offers a secure and stable platform for attaching optics; Provides fast target acquisition in dynamic and low-light situations; Suitable for hunting, competitive shooting, EDC, and tactical applications; Compatible with all GRITR holsters; Covered by GRITR "UNLIMITED GRIT" Lifetime Warranty