Hephaestus - CNC Aluminum Top Rail for GHK AK Series M4 -Large thumb adjustment dial on

-Large thumb adjustment dial on back allow fine tune draw resistance

- Polymer Made Handguard (with Rails on Top / Bottom) With Hand Grip

Functional slide lock

creating a conspicuous hole at the top designed to reduce front-end muzzle weight to better balance the pistol and reduce the overall weight of the slide

Hephaestus - CNC Aluminum Top Rail for GHK AK Series M4 -Large thumb adjustment dial onCNC machined aluminum construction. With steel made retainer, reliable and durable. New locking mechanism, firm and secure. With back up rear sight. Work with Top Cover with without ribs; able to remove install Top Cover with Top Rail installed. Suitable for GHK AK GBB series. [except AKS 74UN and AKMSU]