SIONICS Phosphate Bolt Carrier Group

The SIONICS Phosphate Bolt Carrier Group is a high-quality, Mil-Spec BCG that is machined to USGI specifications. It has a Parkerized exterior and a chrome-lined interior. The carrier includes a proper Mil-Spec gas key that is chrome-lined and heat treated. The gas key is secured to the carrier via OCKS (Optimized Carrier Key Screws) and properly staked. Each carrier includes an installed gasket formed by aviation Permatex that is applied by hand to the mating surfaces between the gas key and the carrier.

The bolt assembly is machined from Mil-Spec Carpenter No. 158® Steel and is shot peened for increased strength. It includes a tool steel machined extractor and ejector, an HD Sprinco extractor spring (5-Coil) , and is high pressure tested and magnetic particle inspected.

Here are some of the key features of the SIONICS M16 style carrier:

• Machined to USGI specifications
• OCKS screws
• Staked gas key
• Aviation Permatex gasket
• Carpenter 158® steel bolt
• HP/MPI tested bolt
• Shot peened bolt
• Sprinco Heavy Duty Extractor Spring – 5-Coil
• Black Spring Insert