Features:
Full steel construction mimics the look and feel of the real thing
Heavy duty synthetic stock and handguard
Adjustable aperture rear sight
Realistic steel charging handle
Paddle or push button magazine release
Full metal reinforced Version 2 gearbox with 9mm bearings
Infornmation:
Model: G3A3
Materials: Steel, Zine Alloy, Nylon, Rubber
Length: 1026mm
Weight:4500g (10 pounds)
Power Source: AEG
Action: Semi/Auto
Ammo Type: 6mm airsoft BBs
Ammo Capacity: 140round 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:
140/500 rds magazine of LCT G3 AEG