Airtech Studios Advanced Hop-Up Chamber/Inner Barrel Locking Ring - MAXX Hop-Up Gun Platform_UMP This is the 6" barrel

This is the 6" barrel model

O-ring seals prevent moisture

8V LiPoly and 9

With a loaded magazine inserted

Airtech Studios Advanced Hop-Up Chamber/Inner Barrel Locking Ring - MAXX Hop-Up Gun Platform_UMP This is the 6" barrelDesigned specifically for the MAXX Hop Up units. Fully locks on to the inner barrel and Hop Up Chamber. Bright orange in colour. Elongated O Rings that latch onto the inner barrel. This stabilized system helps prevent any vibrational shift on the hop set up. Helps improve shooting consistency. Compatible with MAXX Hop Up Chambers: ME Pro & Sport MI Pro & Sport SV VFC SCAR L H ME Umbrella Armory Version ME EMG & Specna Arms Version