Atlas Custom Works Aluminum Outer Barrel, for TM Hi-Capa 5.1, Black

Replacing the stock barrel on a Hi-Capa isn't about gaining range or velocity—it's about finishing the build. The Atlas Custom Works aluminum outer barrel swaps out the factory tube for something that looks and feels more substantial, while keeping exact fit with your Tokyo Marui platform.

What it is. This is an external barrel shell that covers your existing inner barrel and hop-up assembly. It threads onto the slide and gives the pistol a longer, more realistic profile. The aluminum construction keeps weight down while resisting the dings and scratches that come from daily carry or holster work.

What it does not do. This does not change your gun's velocity, effective range, or accuracy. Those are determined by your inner barrel, hop-up unit, and BB quality. The outer barrel is purely cosmetic and structural—it makes the pistol look the part without requiring internal modifications.

Fits TM Hi-Capa 5.1 GBBs. Atlas Custom Works cuts to Tokyo Marui dimensions, so this slides onto any TM-spec Hi-Capa 5.1 gas blowback pistol. It does not fit replicas with different slide geometries unless they explicitly clone TM measurements. If you're running a clone frame, verify the slide interface before ordering.

What you get. The package includes the outer barrel only. Your existing inner barrel and hop-up remain in place. No tools are required for installation beyond what you'd use to field-strip the pistol normally.