Nemo Arms Battle Light 556 BCG AR-15 Nickel Boron Coated 8620 9310

The Nemo Battle Light 556 Bolt Carrier Group AR15 from Nemo Arms delivers enhanced reliability for your AR-15 with a focus on coating technology and exacting tolerances. Built to perform beyond Mil-Spec, this BCG features a case hardened 8620 steel bolt with nickel boron coated ground surfaces to meet precise dimensional and surface finish tolerances, paired with a case hardened 9310 steel bolt also nickel boron coated and ground for superior durability. The firing pin is hard chrome plated and finely ground to maintain smooth operation under demanding conditions, while the gas key is nickel boron coated and stake-connected on 4130 steel for dependable gas sealing. Additional NIB coated components include the cam pin and extractor with a spring rubber insert and O-ring support, contributing to consistent extraction and reliability. Forward assist serrations are integrated for solid compatibility with standard AR-15 platforms, and the overall build is optimized for 5.56x45mm NATO chambers to ensure optimal performance in a wide range of rifle-length and carbine configurations. This BCG is ideal for shooters seeking lasting accuracy and dependable cycling in demanding field or range environments.