VDI direct impingement full auto rated bolt carriers are compatible with mil-spec and non mil-spec upper receivers and associated components. This bolt carrier is machined to meet all MIL TDP specifications and is enhanced using LifeCoat treatment providing superior:
The key is staked in place and the 1st stage of coating is to deposit a layer of pure Nickel onto the carrier. This gives superior Lubricity and Corrosion Resistance. A second Physical Vapor Deposition(PVD) type application is then applied that adds superior outside wear resistance during surface-to-surface contact , which also adds a Dark Grey/Black Pigment. The collaboration of these 2 coating processes, along with the superior surface preparation unites in sequence to offer superior lubricity, corrosion resistance, surface hardness and texture for the optimal functional performance of this part.