Atlas Custom Works Aluminum Optic Mount for TM Hi-Capa 5.1 & 4.3, Red

Most Hi-Capa players start with iron sights and eventually hit a wall: they want a red dot for faster target acquisition, but the slide has nowhere to put one. The Atlas Custom Works optic mount solves that by machining a flat plate onto the top of your TM Hi-Capa 5.1 or 4.3 slide, giving you a solid mounting surface for a red dot without replacing the entire slide.

What you get. This is a single-piece CNC aluminum mount in red anodized finish. It bolts directly to the existing slide of your Tokyo Marui Hi-Capa 5.1 or 4.3, preserving the original blowback action while adding optic compatibility. The mount ships alone—no optic is included—so you'll need to pair it with a red dot that matches the hole pattern it provides.

Why CNC aluminum matters. Budget mounts often use pot metal or polymer, which flex under recoil and lose zero. CNC-machined aluminum is rigid enough to hold a red dot steady through thousands of rounds, and the red anodizing resists wear without adding noticeable weight.

Before you buy. Check which optic footprint your red dot uses. Some mounts are cut for specific patterns (like the RMR or Leupold DeltaPoint), and a mismatch means you'll need an adapter plate. Also verify your slide thickness and screw length—some optics require longer mounting screws than others. The mount is designed for TM Hi-Capa 5.1 and 4.3 slides specifically; it will not fit other pistol platforms.

Includes only the optic mount. Red dot, screws, and installation tools are sold separately.