Atlas Custom Works
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The Tornado is Atlas Custom Works' aluminum outer barrel for Tokyo Marui Hi-Capa 4.3 gas blowback pistols. It replaces the factory barrel to give you a more substantial look and feel, and it opens the door to swapping in a longer inner barrel if you want better accuracy.
Aluminum is the right material here. It's light enough that you won't notice the weight change on the range, but it's tough and won't chip like cheap polymer. The green finish is cosmetic—it won't affect how the gun shoots.
You get just the outer barrel in the box. If you want to upgrade the inner barrel too for better consistency, you'll need to buy that separately. Installation is straightforward: slide out the old barrel, slide in the new one. No special tools required.
This won't change your FPS by itself. To see real gains, pair it with a quality inner barrel and tune your hop-up. The Tornado is the housing; the inner barrel does the work.