VFC HK416A5 AEG (w/ Avalon ECS Gearbox) (Black / Tan) (US Version) Color:Black - Low profile top portion

- Low profile top portion fits both M4 / HK416 receiver magwell

Window Size: N/A

Anodization Coating / Laser Marking

But you knew that since you're not stupid

and also uses AEG springs

VFC HK416A5 AEG (w/ Avalon ECS Gearbox) (Black / Tan) (US Version) Color:Black - Low profile top portion***Gun may come with Orange Tip*** Body: Full metal receiver Inner Barrel: ~300mm, 6. 05mm ID. Hopup: VFC rotary style chamber w 50 bucking Gearbox: V2 ECS Avalon gearbox w quick spring change Magazine: Standard M4 magazine Muzzle Velocity: 370 410 fps w 0. 2g Electronics: VFC Updated MOSFET Battery: 7. 4v 11. 1v M4 Stick (11. 1v Lipo ready) Battery Location: Rear wired to Deans in a buffer tube Barrel Threading: 14mm CCW Feature: Built in mosfet