The One Horse M16 Bolt Carrier Group is a duty-ready upgrade designed to deliver reliable cycling, consistent extraction, and long-term durability across a wide range of AR15 platforms. Built to true Mil-Spec standards and compatible with 5.56 NATO, .223 Wylde, and .300 Blackout, this BCG is engineered for shooters who demand dependable performance under hard use. Featuring a full salt bath nitride finish and precision-machined components, it provides smooth operation and simplified maintenance in a rugged, no-nonsense package. Proudly manufactured in the USA, this bolt carrier group is built to run. Specifications: Manufacturer: One Horse Type: M16 Bolt Carrier Group Caliber Compatibility: 5.56 NATO / .223 Wylde / .300 Blackout Bolt Material: 9310 Tool Steel Carrier Material: 8620 AQ Steel Extractor Material: S7 Tool Steel Finish: Salt Bath Nitride (Bolt, Carrier, Cam Pin) Testing: Magnetic Particle Inspection (MPI) Gas Key: Properly staked with Grade 8 fasteners Extractor Setup: Spring, insert, and O-ring installed Compatibility: Full-auto compatible, forward assist serrations