This HPA adapter represents the culmination of months of work to produce, from scratch, a shortened magazine for the Tokyo Marui GBB MP7. This leads to an ultra lightweight magazine setup, that is both more enjoyable and economical than buying the gas mags.

Field limits can be achieved with around 100-110PSI. 

If you are purchasing the adapter with a drum modular base, the drum magazine must be purchased separately here 

Installation

A donor mag is required to build this adapter. You will need to remove the gas valve, feed lips, gas router and valve knocker from your gas magazine, and install them onto our adapter. 

We pressure test each adapter before shipping, to ensure that your valve will drop straight in and seal! We require donor parts to ensure absolute compatibility with your RIF.