Toolcraft DLC 5.56 BCG

The Toolcraft DLC BCG represents the sweet spot for shooters seeking premium performance without premium pricing. Toolcraft combines their proven OEM manufacturing quality with IonBond Diamond-Like Carbon coating technology, delivering one of the hardest and most friction-resistant surfaces available. The DLC coating achieves an exceptional 90 Rockwell hardness rating while maintaining an ultra-low coefficient of friction of just 0.15, significantly outperforming nickel boron (0.5-0.8 friction coefficient and 82 Rockwell hardness).

Applied through a Physical Vapor Deposition (PVD) process, the IonBond DLC creates a molecular bond with the base metal that will not chip, crack, or peel even under extreme stress. The coating is self-lubricating in dry conditions, extremely resistant to wear, and highly resistant to corrosion. The finish is measured in microns with minimal dimensional change, ensuring proper fit in any mil-spec upper receiver while providing years of protection against wear and environmental degradation.

Toolcraft manufactures these BCGs from their proprietary 8620 steel carriers paired with your choice of mil-spec Carpenter 158 or stronger 9310 steel bolts. The gas key is constructed from 4130 steel with DLC finish, fastened with grade 8 screws and properly staked to prevent loosening. Each BCG undergoes MPI and HPT testing and is backed by Toolcraft's lifetime replacement warranty. For builders who demand DLC performance but appreciate Toolcraft value, this BCG delivers premium coating technology at mid-tier pricing.