FRANKLIN ARMORY AR BOLT CARRIER GROUP 5.56MM

The Franklin Armory AR Bolt Carrier Group is a direct-fit replacement BCG designed for AR-style rifles chambered in .223 Rem / 5.56 NATO. Treated with Salt Bath Nitride (SBN) for improved surface hardness and corrosion resistance, this BCG is built to industry-standard dimensions and features components used in Franklin Armory complete builds. The BCG is compatible with Franklin Armory binary trigger systems and is finished in black for a low-profile appearance.

Key Specifications

• Compatible with .223 REM/5.56 NATO cartridges.
• Treated with Salt Bath Nitride (SBN) for surface hardness and corrosion resistance.
• The carrier is machined from 8620 steel.
• The bolt is machined from Carpenter No. 158 or 9310 steel (varies by availability).
• Features an M16 full-auto style MPI bolt.
• Includes a properly staked gas key.
• Provides an extractor with an O-ring and an extractor spring.
• Includes a stainless steel firing pin.
• Finished in black and shipped as a new accessory-bolts product.
• Country of origin listed as US.

This bolt carrier group offers a straightforward, durable solution for builders and shooters who require a serviceable, correctly finished component for AR-style platforms in .223 Rem / 5.56 NATO. Its SBN treatment, staked gas key, and standard M16-style bolt construction make it suitable for routine use, maintenance, and upgrades where reliable componentry is expected.