Atlas Custom Works Aluminum Outer Barrel for TM Hi-Capa 5.1 Airsoft GBB Pistols, Blue

The Atlas Custom Works Aluminum Outer Barrel replaces the factory barrel on your Tokyo Marui Hi-Capa 5.1, giving you a different look. This isn't a performance upgrade in the traditional sense — the inner barrel and hop-up do the actual work. What you get here is external customization.

What the material means. Aluminum is the standard for aftermarket outer barrels. It's light and resists corrosion. The blue finish is meant to hold up with normal handling.

What it does and doesn't do. This is an outer barrel only. It does not include an inner barrel, hop-up chamber, or bucking. If your goal is better accuracy, you'll need to upgrade those components separately. The outer barrel's job is to protect the internals and add weight forward for a slightly different balance.

Installation. Swapping an outer barrel on a Hi-Capa is straightforward but does require partial disassembly. You'll need to remove the slide assembly, take out the inner barrel and hop-up unit, then fit the new outer barrel to the slide. If you're not comfortable working on your pistol, a local tech can do this in under 30 minutes. Keep the factory barrel if you want to swap back or for parts.

Before you buy. This fits the Tokyo Marui Hi-Capa 5.1 platform specifically. It won't fit other pistol platforms without a compatible slide. The blue color is cosmetic only and carries no performance or FPS implication. Barrel and accessory are sold separately.