The Luth-AR Complete Bolt Carrier Group (Luth-AR part no. BCA223) is a fully assembled BCG built for .223 Remington and 5.56 NATO AR-15 platforms. As a complete assembly, it drops straight into a mil-spec upper receiver without needing to source and fit individual bolt, carrier, firing pin, and cam pin components separately. Luth-AR builds its AR parts to mil-spec tolerances, so this carrier group is a straightforward, no-surprises option for a first build, a spare parts kit, or replacing a worn-out BCG.

Key Specifications

• Sized for .223 Remington/5.56 NATO AR-15 platforms.
• Sold as a complete, fully assembled bolt carrier group ready to install.
• Built to mil-spec tolerances for reliable fit in a standard AR-15 upper.
• Includes the bolt, carrier, firing pin, and cam pin as one matched assembly.
• Compatible with standard mil-spec AR-15 upper receivers.

Frequently Asked Questions

Does this come fully assembled? Yes, it is a complete bolt carrier group ready to drop into a mil-spec upper.

What caliber is this BCG built for? .223 Remington and 5.56 NATO AR-15 platforms.

Buy the Luth-AR Complete Bolt Carrier Group

Keep a reliable spare on hand or complete your build with a mil-spec .223/5.56 bolt carrier group ready to install. See more from Luth-AR or shop our full lineup of AR bolt carrier groups. Order it from our Lubbock, Texas gun shop for fast, insured shipping as soon as it’s ready to ship.