Features:
14mm steel made flash hider.
Aluminum-made 11.5-inch Raptor Rail Handguard with the 13-inch outer barrel.
2 short rail + 1 long rail included for installation on the Raptor Rail Handguard for attaching any rail attachments.
Comes with a metal frame with no marking and a standard 20mm rail on the upper frame for rail attachments.
Constructed with we Open Bolt GBB system.
Adjustable hop-up system.
Realistic break-down, the same as the real steel m4 a1 rifle.
Includes a nylon fibre made navy style collapsible retractable stock with 6 positions.
Includes a 30 rounds m4 open bolt gas magazine.
Infornmation:
Model: H013B-Black Dragon 7.0 B-version
Materials: Steel, Zine Alloy, Nylon, Rubber
Length: 285mm
Weight:1180g (6.2 pounds)
Power Source: GBB
Action: Semi/Auto
Ammo Type: 6mm airsoft BBs
Ammo Capacity: 30 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
30 rds V3 Gas Magazine for WE MSK/ M4/ M16/ SCAR