5KU CNC Aluminum Lightweight Blowback Unit For Action Army AAP 01 GBB Pistol Airsoft Guns (Gold) Inner-Barrel-Length-(mm)_390 where the Bifrost differs from

where the Bifrost differs from others

KSC M93R Auto 9 Heavy Weight Gas Pistol

- Made of 6061-T6 Aluminum

ARES M4 Blast Shield (Type D)

The innovative 3rd generation trigger sensor offers you even 420 possible sensitivity settings

5KU CNC Aluminum Lightweight Blowback Unit For Action Army AAP 01 GBB Pistol Airsoft Guns (Gold) Inner-Barrel-Length-(mm)_390 where the Bifrost differs from5KU CNC Aluminum Lightweight Blowback Unit For Action Army AAP 01 GBB Pistol Airsoft Guns (Gold) CNC Aluminum Construction Blow Back Unit BBU Design For Upgrade the Original Parts More Durable Allow for your Blow Back much faster Cycling Suitable For Action Army AAP 01 Series Gas Blow Back GBB Pistol Airsoft Guns