Here are some photos of the individual components in the Ops-Core Advanced Combat Helmet upgrades. Naturally, they can be all adopted or as individual pieces.
The first piece is the 360 Deg Liner and Retention System. It attaches into place via the Velcro patches already installed in the ACH shell. The liner provides permanent impact protection (particularly against rotational forces) and you still insert pads
so I’m going to suggest, if you use this upgrade, you’ll need to size up on your shell.
UPDATE – It’s true you use pads with the EPP liner but they are specially designed for use with the liner. It is not designed to be used in conjunction with the issue helmet pad. I spoke with Ops-Core and they gave me this info.
The new liner has a variable thickness EPP protective component that is coupled with comfort pads that come in three thicknesses: 1/4″ 3/8″ and 1/2″ to create ideal comfort and stability. Individuals wearing a large ACH with issue pads can use the new liner in the same size shell with greater comfort and stability
The Skeleton One Hole Shroud weighs just 42.1 grams. It’s streamlined design is snag free and the single hole will fit right on to the ACH.
They’ve also incorporated space in the lightening holes to tie off your NODs, if needed.
The skeleton rails offer 14 wire and cable management attachment points. They are also universally sized to fit all ACH sizes Small through Extra-Large.
The items are available in Black, Urban Tan and Foliage Green.