Atlas Custom Works AAP-01 Aluminum Outer Barrel Type B, Red

The Atlas Custom Works Type B outer barrel gives your AAP-01 a distinct look and the solid feel of machined aluminum. It's a straightforward upgrade for players who want their GBB pistol to stand out without adding bulk or weight—this one tips the scale at just 60 grams.

What it changes. Swapping the outer barrel is purely cosmetic and doesn't touch the inner barrel, so your point of aim and accuracy stay the same. The aluminum construction is durable enough for regular field use and resists the dings that come from holster work and gear clashes.

Type B specifics. This is the Type B variant, which refers to a specific length and profile in Atlas's lineup. It's designed to fit the Action Army AAP-01 GBB pistol's slide and frame without modification. If you're chasing a particular silhouette or matching a red-accented build, this is the piece that delivers it.

What you get. Just the outer barrel. You'll keep your existing inner barrel, hop-up unit, and all internals—this is a drop-in replacement for the outside shell. The red finish is a bold choice that won't blend in, and it's consistent throughout the piece rather than a surface coating that can wear.

Compatible only with the Action Army AAP-01 GBB pistol platform.