Fitting FMA ARC Rail Adapters to MSA Sordin Supreme Pro X Headset Base Jump Helmet ZTactical

A tutorial showing how to fit FMA ARC Rail Adapters to a pair of MSA Sordin Supreme Pro-X to go onto a FMA BJ (Base Jump) helmet. I’m not sure if the MSA Sordins are similar inside to the Z-Tactical replicas, please comment below if you’ve opened a pair up comment below.