NCT, Calico, Tech Nickel, Abrisa and TS USA are part of the HEF Group. HEF is a global surface engineering company offering PVD coating, DLC coating, Salt Bath Nitriding QPQ, REM isotropic finishing, and optical coatings. Our focus is on improving product performance by reducing wear, reducing friction and preventing corrosion. We offer solutions for nearly all your firearm surface treatment requirements and optical applications. We understand your struggles with corrosion, wear, friction, and erosion, and the need for protection in a high temperature operating environment. We have the sol (less)