Now in stock at eHobby Asia is the SenminSisou Salamander M870 Masterkey Kit for Marui M870 Shotgun. This kit allows you to install the Marui M870 Breacher Gas Shotgun to the underrail of an AR AEG or GBB to serve as the masterkey. Does not come with the Marui M870 Breacher.

• QD Mount Design for install Marui M870 Shotgun on Rifle 20mm Rail handguard
• Come with Small Gas Tank (One Charge can shoot 20 times)