5.56X45MM NATO MIL-SPEC BOLT CARRIER GROUP FOR AR-15/M16

When picking components for your next mil-spec rifle build, having high-quality internal components that are guaranteed to mesh with your other mil-spec parts is a must, and the Faxon Firearms M16 Bolt-Carrier Group is designed to do just that. Machined from 9310 tool steel, the Faxon Firearms M16 Bolt-Carrier Group is heat-treated and shot-peened to military specifications and features a number of other features to enhance reliability, such as chamfering on the rear of the locking lugs. The BCG includes a spring, insert and Crane O-ring already installed. Thanks to the M16 profile of the Faxon Firearms M16 Bolt-Carrier Group, the unit is compatible with full-auto lowers and also features serrations compatible with the upper receiver's forward assist. FEATURES Designed for 5.56 NATO All-black finish Salt-bath Nitride treated Magnetic particle inspected 9310 Tool Steel Bolt Full MIL-SPEC Heat Treatment Shot Peened to MIL-SPEC Magnetic Particle Inspection (MPI) Back of Lugs Chamfered for Reliability Spring, Insert, & "Crane" O-Ring Installed Salt Bath Nitrided Bolt & Carrier S7 Extractor Superfinished Carrier Body Full Auto Compatible Forward Assist Serrations