Maple Leaf 6.02mm 150mm Nickel Plated Inner Barrel for G17/18, Desert Warrior, Hi-Capa 4.3, P226, Silver

The Maple Leaf 6.02mm inner barrel is for players who have already maxed out their GBB pistol's hop-up and want the next incremental gain. Standard airsoft barrels run 6.03mm; this one is machined to 6.02mm, which tightens the seal between BB and bore. That reduces air loss and makes the hop-up's backspin more consistent, especially with heavier BBs in the 0.25–0.30g range.

What the 150mm length means. At 150mm, this is a full-length G17/G18 barrel. You get the velocity and stability of a longer bore without sacrificing the pistol's draw and holster profile. If your slide is a standard thickness, it should close normally with this barrel installed. Some aftermarket slides with tighter internals may need a light polish or a slightly shorter barrel.

Brass with nickel plating. Brass is easy to machine to tight tolerances, and the nickel plating adds corrosion resistance and a smooth surface for the BB to travel. This is not a cold-hammer-forged rifle barrel, and it does not need a break-in period the way some premium airsoft barrels do. You can install it and shoot.

Compatibility. Fits G17/18, Desert Warrior, Hi Capa 4.3, and P226 GBB pistols. This is not for AEGs. The barrel comes unthreaded at the muzzle end, which is standard for pistols. If your slide has an external thread for a compensator or suppressor, this barrel will not expose it.

What to expect. A tighter barrel alone does not make a pistol accurate. The hop-up chamber and bucking must seal cleanly, and you need consistent BB quality. On a well-sealed GBB with good hop-up, the 6.02mm bore helps translate that consistency into tighter groups at 20–30 metres. On a worn or poorly tuned pistol, the improvement will be marginal.

Includes only the inner barrel. Installation requires field-stripping your pistol and replacing the existing barrel. Battery and charger are not included — this is a GBB part, so you will need green gas or CO2.