ITP AW / WE GBB Drum Magazine Adapter for MARUI MWS AR / M4 GBB Airsoft

Requires a M4-type AW GAS BB Drum Adapter requires a set of M4 magazine parts: a feeding lip, a gas router, and an exhaust valve (except GHK ver.) Includes an HPA adapter compatible with AW GAS BB Drum Simply remove the gas input valve on BB Drum then install the HPA adapter and connect to the HPA system