Airsoft Masterpiece Type R7 Aluminum Grip for Hi-CAPA - Black ak operator You can change the spring

You can change the spring if you want to take it to a CQB game though

SKU BW-AR-ICS-AEG-M16RAS Item Weight (gram) 3520 Major Color Black Length 1250mm Barrel Length ~500mm Hop-up Adjustable Shooting Mode Semi/Fully Automatic AEG Motor Turbo 3000 Middle pin motor AEG Power Source 8

this new M870 also has 3 inner barrels inside the outter barrel

SKU GP774B Item Weight (gram) 725 Major Color Black Manufacturer G&P Hop-up N/A Shooting Mode N/A Gearbox Type N/A Fit Battery Pack N/A Bullet Type N/A Pistol Power Source N/A

Airsoft Masterpiece Type R7 Aluminum Grip for Hi-CAPA - Black ak operator You can change the springProduct Brand: Airsoft Masterpiece Product Code: 21681234700 Weight: 155g Material: Aluminum