Features:
Fully upgradeable with all Marui aftermarket upgrade parts (thousands of upgrade parts)
New "Quick Spring Change" Gearbox Design.
Realistic Blowback system!
Realistic break-down!
2000 Round Super Hi-Cap Drum Magazine included.
1:1 scale ultra realistic heavy weight design
Ultra Realistic One-Piece Stamped Steel Body Construction.
Real Steel Grade Real Beech Wood Stock just like the real gun!
Infornmation:
Model: PPSH-41
Materials: Steel, Zine Alloy, Nylon, Rubber
Length: 855mm
Weight:3600g (6.7 pounds)
Power Source: GBB
Action: Semi/Auto
Ammo Type: 6mm airsoft BBs
Ammo Capacity: 2000 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 
PS:
540 rds Magazine for S&T PPSH AEG Airsoft
2000 Rds Drum Magazine for S&T Snowwolf PPSH41