Atlas Custom Works 4.3" Stainless Outer Barrel for TM Hi-Capa GBB Pistols, Silver

The 4.3-inch Atlas Custom Works outer barrel is a straightforward upgrade for TM Hi-Capa GBB pistols. It replaces the factory barrel to give you a cleaner, competition-style look and the threading to mount muzzle devices. Stainless steel construction makes it durable, though it does add a bit of weight compared to aluminum alternatives.

Threading and compatibility. The barrel uses 11mm CW (positive) threading, which is standard for Hi-Capa platforms. This accepts most common muzzle devices, compensators, and mock suppressors made for the platform. If you're running a tracer unit, verify it's rated for 11mm CW before purchasing.

What to expect from the length. At 4.3 inches, this is a compact outer barrel. It keeps the overall profile tight for concealed carry builds or CQB setups where a long barrel would be cumbersome. The inner barrel and hop-up determine your accuracy and range, not the outer barrel itself—this is primarily an external upgrade with mounting capability.

Installation note. This is the outer barrel only. You'll need to disassemble your Hi-Capa slide to swap it out, and some fitting may be required depending on your slide's inner dimensions. If you're new to Hi-Capa builds, watch a teardown video first or have a tech handle the install.

Includes only the outer barrel. No mounting hardware or muzzle devices are included.