Features:
Full Metal and Steel Construction
Electric blow back mechanism
New Generation Innovative Proprietary Gearbox
Battery Compartment Located in Pistol Grip
One Piece Stamped Steel with Genuine Welding Mark
Hinged Ejection Port Flap that Acts as the Safety
Retractable Steel Stock
Integrated Hopup Unit with Easy Hopup Adjustment
Infornmation:
Model: M3A1
Materials: Steel, Zine Alloy, Nylon, Rubber
Length: 590-760mm
Weight:3120g (6.8 pounds)
Power Source: GBB
Action: Semi/Auto
Ammo Type: 6mm airsoft BBs
Ammo Capacity: 520 round magazine
FPS: 400
Bunker Tech Upgrades
Maple leaf gbb 6.02mm Inner Barrel
Maple le af  High Accuracy Hop-up Bucking- Internal Parts Adjust
All function checks, to avoid common tolerance issues.
BB weight for optimal performance: 0.36 gram
PS:
S&T M3A1 520rd High Cap Magazine
S&T and Snow Wolf M3 is literally the same.