Madbull M4 CQB 7-Inch Outer Barrel Gears and Motors Choose from the wide selection

Choose from the wide selection of models to suit your needs

• Interior polished to protect coating on firearms

We will offer a flow reducing option in the future for the engine to reduce the output energy and allow higher operating pressure for longer barrel builds

·         Compatibility – KSC G19

About HPA BBs

Madbull M4 CQB 7-Inch Outer Barrel Gears and Motors Choose from the wide selection~1cm length adjustable. Fits most M4 AEG receivers in the market. 2" screws to lock the adjustable parts. This barrel is for extreme short CQB setups, features front sight pin groovesGreat if you want to really shorten your M4 for CQB! Note: the entire barrel including chamber section is 7" long.