Detonator "Storm Lake" Threaded Outer Barrel for Marui G19 GBB series – Boomarms
Detonator "Storm Lake" Threaded Outer Barrel for Marui M&P9 series - B – Boomarms
Amazon.co.jp: Detonator Outer Barrel Tokyo Marui Gas Blow M&P 2.8 gal (9 L), PC Ported Only (Storm Lake/0.6 inch (14 mm) Reverse Screw, Aluminum, Silver) : Hobbies