It is possible but a slight pain in the ass, I came across some ACH's at a very reasonable price and decided to cut them down to a high-cut ballistic. It's time consuming properly cutting the helmet then cleaning the edges and epoxy sealing, also ran across some Oregon pads and suspension systems cheap. I made the helmet cover and installed rails, yeah I can go buy one but that's no fun I'm a cheap bastard and prefer DIY projects.