G&P WA M4 GBB Negative Pressure Roller Bolt Carrier (Gold Chromic Coating, Set B) MWS G.I 4V Mini Type battery Fit

4V Mini Type battery Fit Battery Pack Mini / Handguard (Nickel / Li-Po) Barrel Thread Type Counter-Clockwise Barrel Thread Diameter 14mm Magazine Capacity 300 Rounds Bullet Type 6mm BB Power (Muzzle Velocity) 370FPS Manufacturer King Arms

You can fit a thin stick battery in there with a Tamiya plug

and marketing of innovative tools

Gearbox Inside Spring Set

Length: 162mm

G&P WA M4 GBB Negative Pressure Roller Bolt Carrier (Gold Chromic Coating, Set B) MWS G.I 4V Mini Type battery FitG&P WA M4 GBB Negative Pressure Roller Bolt Carrier (Chromic Coating, Set B) Inside (PA) Outside (Gold Chromic Coating) For Bomber GBB CNC Metal Body ONLY Come With 2x Polymer Nozzle Set ( Negative pressure operated blowback system ) Design For Replace The Original Bolt Carrie SKU GP WP206B Item Weight (gram) 205 Major Color Gold Built Material Inside (PA) Outside (Chromic Coating) Manufacturer G&P Disclaimer NOTES: Self Installation & Modification