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Airsoft GBBR Inner Barrels

A precision inner barrel is one of the best accuracy upgrades for a gas blowback rifle. A smooth, consistent bore gives tighter groupings and more reliable range.

Choose 6.03mm precision inner barrels for the Tokyo Marui MWS, MP7 GBB and PP-2K from Unicorn, Modify and Prometheus.
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Frequently Asked Questions

Need To know more?

What length do I need?

Each rifle needs a specific length. Check your rifle's specification or measure your existing barrel.

What does 6.03mm mean?

It's the bore diameter. A 6.03mm tightbore improves consistency over a standard barrel.

Will it change my FPS?

It can. Always chrono after fitting a new barrel.

Should I change my bucking too?

It's a good idea, so the new barrel can perform at its best.

Our GBBR Barrels

MWS owners can fit the Prometheus 370mm M4A1 MWS barrel. MP7 GBB owners can choose the Modify SSX 146mm stainless barrel, and PP-2K owners the Modify PP-2K 300mm barrel. The Unicorn Nitroflon-coated 6.03mm barrel comes in various sizes and reduces friction.

Choosing a Length

Each rifle needs a specific barrel length, so check your rifle's specification or measure your existing barrel before ordering.

Complete the Upgrade

Pair your barrel with a fresh GBB bucking and an upgraded GBBR hop-up chamber. Always chrono after fitting.
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