Transform ACH style helmets into a streamlined platform capable of integrating mission enhancing components and accessories such as visors, mandibles, lights and cameras. One size fits all. (Fits the bolt pattern of Gentex ACH style helmets, sizes small to extra-large.) Easily mounts to the sides of the helmet. Mounts using existing chinstrap holes in the helmet. Corners of the rail designed for compatibility with Ops-Core O2 Mask Straps making the helmet suitable for HALO/HAHO operations. Designed to emergency release accessories at 8ft-lbs (11 Newton meters) of torque to prevent neck injuries in the event of snagging. Durable, lightweight construction. Kit includes: (2) Ops-Core Skeleton ARC Rails, (2) Picatinny Adapters, (2) Wing- Loc Adapters, ballistic mounting hardware, and (10) cable ties. Accessory: ACH, TBH, Skeleton ARC Rail Kit and Hardware, [Universal], Black Specifications Brand: Ops-Core Manufacturer part #: H10039-03 Category: Body Armor & Protection › Riot Gear Shipping weight: 0.55 lb Country of origin: US Ships fast from GunCycle — free economy shipping on orders $99.99+.