Sons of Liberty Gun Works OCKS Bolt Carrier Group Features Sons of Liberty Gun Works views the bolt carrier group as the heart of the AR platform the component that drives every part of the cycle of operations from locking and unlocking to extracting and ejecting. The OCKS Bolt Carrier Group reflects that philosophy with a full auto profile carrier built to the same specification used in select fire rifles for maximum durability and reliability under hard use. The included OCKS or Optimized Carrier Key Screws upgrade addresses a common failure point on standard bolt carrier groups where the carrier key can loosen under sustained firing and cause cycling malfunctions. Every bolt is full auto test fired at assembly giving buyers a verified functional component rather than one tested only by sample. Finished in a black phosphate coating the OCKS Bolt Carrier Group resists corrosion and wear while providing the lubricity needed for smooth cycling over thousands of rounds. The carrier group is compatible across 5.56 NATO .223 Remington .300 Blackout 6MM ARC and .350 Legend platforms giving shooters flexibility to use the same quality component across multiple caliber builds. Because SOLGW test fires each bolt individually buyers get a documented level of quality assurance that many off the shelf bolt carrier groups simply do not offer. The Sons of Liberty Gun Works OCKS Bolt Carrier Group is available for sale at GrabAGun for shooters who want a proven upgraded component at the core of their AR build. Sons Of Liberty Gun Works OCKS Bolt Carrier Group Specifications Manufacturer: Sons Of Liberty Gun Works Model: OCKS Bolt Carrier Group Type: Bolt Carrier Group Description: Optimized Carrier Key Screws Finish: Phosphate Color: Black Compatible Hosts: 5.56 NATO .223 Remington .300 Blackout 6MM ARC .350 Legend Caliber: 5.56 Available At: GrabAGun