NP3 coating is an excellent choice for firearms due to its combination of electroless nickel plating and a fluoropolymer layer. The nickel plating enhances corrosion resistance, while the fluoropolymer significantly reduces friction, improving the smoothness and overall reliability of moving parts. This is especially useful in high-performance firearms where reducing wear and tear is critical. Additionally, NP3's resistance to fouling means less buildup of carbon and other residues, making maintenance easier and less frequent. This makes NP3 a popular choice for BCGs, bolts and other parts in firearms where both durability and smooth function are essential. M16 auto profile carrier machined from aircraft and bearing quality 8620 steel, properly heat-treated, precision ground and finished with a chrome-lined phosphate coating for durability and corrosion-resistance Bolt machined from a 1-piece of 9310 steel, properly heat-treated, precision ground, shot-peened, MPI tested and finished with an NP3 coating for enhanced durability and corrosion-resistance Firing pin machined to Mil-Spec print from 8740 steel, precision ground and chrome-plated for durability and corrosion-resistance 1-piece billet, fully machined enhanced extractor with a phosphate coating for increased reliability and corrosion-resistance NP3-coated cam pin for enhanced durability S7 tool steel ejector and extractor retaining pin for enhanced strength and durability 4130 steel gas key, precision staked using a hydraulic staking machine with an NP3 finish for enhanced durability and corrosion-resistance KAK carrier key screws with T25 drive, grade 8 and proper heat treatment for durability and secure fastening