This HPA adapter represents the culmination of months of work to produce, from scratch, a shortened magazine and HPA adapter for the Tokyo Marui GBB MWS. This leads to an ultra lightweight setup, that is both more enjoyable and economical than buying the gas mags.

A donor mag is required for feed lips, exhaust valve, gas route and valve knocker

Video instructions can be found here

Features:

1. Compatible with most M4 magazines, works best with EPM and EPM1s

2. CNC Mag Release and Feed Tube

3. BB retention mechanism to reduce BB loss during magazine changes

4. US Style Fitting as standard