The 1.93 DOT Mount by Reptilia is a lightweight, slim-line mounting solution for a variety of red dot optics. Machined from billet 7075-T6 aluminum with Milspec Type III hard anodized finish, the 1.93" DOT Mount attaches to any M1913 Picatinny rail to place the optical axis at 1.93" above the rail. Its spring-loaded nitrided steel clamp and mounting bolt simplify the installation process and sit flush with the body of the mount for a low-profile, anti-snag design. Compatible with- Aimpoint Micro R-1, H-1, H-2, T-1, T-2, CompM5; Sig ROMEO4 & ROMEO5; Vortex Optics Crossfire, Sparc I & II; Primary Arms Micro Dot & Advanced Micro Dot; Holosun Technologies HS403 & HS503 Series. Made in the USA. Also compatible with: Sig Sauer ROMEO4 , ROMEO5 & ROMEO-MSR Vortex Optics Crossfire, Spitfire, Sparc I & II Primary Arms Classic Series Gen II, SLx Advanced Rotary Knob Microdot, & SLx Compact 120 Prism Scope ACSS-Cyclops Holosun Technologies HS403(not HS403A), HE403, HS503, HE503, HS515, HE515, & HE530.