Customize Option:
FPS Option (FPS 400 or 300)
Upgraded Inner Barel and Hop-Up Rubber 
 
Features:
Realistic blowback design
Fixed carry handle with built-in rear sight
Early Type adjustable stock
Classic triangle handguard
Early type Colt type grip
Full length fixed polymer stock
 
Infornmation:
Model: XM177
Materials: Steel, Zine Alloy, Nylon, Rubber
Length: 760/830mm
Weight: 3200g (7.20 pounds)
Barrel: 370mm inner barrel
Power Source: Green Gas
Action: Semi / Auto
Ammo Type: 6mm airsoft BBs
Ammo Capacity: 20-round full-size metal 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 
WE TECH AR 20rd V3 Gas Magazine