Atlas Custom Works CNC Aluminum Matrix Kit for Marui Hi-Capa GBB Airsoft Pistols, Grey/Gold

The Hi-Capa is the 9mm of airsoft pistols: a platform built to be customized. If you're running a stock polymer slide and want the weight, feel, and durability of metal, this Atlas Custom Works kit gives you the full upper assembly in CNC aluminum.

What you're getting. The kit includes a slide set, recoil spring guide, and hammer housing—all machined from aluminum with an anodized finish. At 440g, this is substantial metal. That weight changes the recoil impulse compared to a polymer slide and can affect your slide cycle depending on your gas system.

Compatibility. Designed for Tokyo Marui Hi-Capa and compatible GBB pistols. The Hi-Capa has one of the largest aftermarket ecosystems in airsoft, so once you're on this platform, you're not locked into proprietary parts.

Before you buy. This is a slide and upper assembly kit, not a complete pistol. You're upgrading an existing Hi-Capa, not building from scratch. The added mass may require gas system tuning to maintain reliable cycling—what works on a light polymer slide can under-cycle a heavy metal one. If you're new to the platform, start with a complete gun before swapping externals.

Includes federally mandated blaze orange muzzle tip where required.