Features:
Same system to Tokyo Marui M870 Gas Shotgun
Select between 3/6 shots  
Mlock Pump charge
1/4 length top Pic-Rail
Folding buttstock can change to any AR system Buttstock
AR style grip which also can change to and grip that fit AR
Infornmation:
Model: CSG Series
Materials: Steel, Zine Alloy, Nylon, Rubber
Length: 655/740mm
Weight:2202g (4.9 pounds)
Power Source: GBB
Action: Semi
Ammo Type: 6mm airsoft BBs
Ammo Capacity: 26 round magazine
FPS: 400
Bunker Tech Upgrades
Maple leaf gbb 6.02mm Inner Barrel
Maple leaf  High Accuracy Hop-up Bucking- Internal Parts Adjust
All function checks, to avoid common tolerance issues.
BB weight for optimal performance: 0.36 gram