Prometheus EG Power 6.00mm Barrel for Marui M4A1 MWS GBB (370mm)

Prometheus 6.00 EG Power Inner Barrel for Marui M4A1 MWS GBB (370mm) For Tokyo Marui M4A1 MWS Airsoft Gas Blow Back GBB Rifle High grade precision barrel at 6.00mm diameter for extra power and precision shooting With a precision barrel, you can opt for higher grade precision BB's for greater accuracy Choose this barrel to suit your GBB model For custom upgrade user, you can choose a longer barrel PROMETHEUS EG Barrel by LAYLAX (JAPAN) Length: 370mm NOTE: You can always choose a longer Barrel if you have a extended Outer barrel installed