Colt Sp64028 5.56 Bolt Carrier Group

The Colt SP64028 5.56 bolt carrier group is a genuine Colt component built for AR-platform rifles chambered in 5.56 NATO. Whether you're assembling a rifle from the ground up, replacing a worn carrier, or keeping a spare on hand for the range or field, this is OEM Colt quality you can trust. Colt bolt carrier groups are engineered to Mil-Spec standards and manufactured to exacting tolerances, ensuring reliable feeding, extraction, and bolt operation across thousands of rounds.

This carrier group handles the demanding cycle of semi-automatic fire without compromise. The robust design cycles smoothly whether you're running suppressed or unsuppressed, and pairs seamlessly with standard AR upper assemblies and charging handles. Having a quality spare BCG in your kit—or building a complete upper with one—removes guesswork from reliability and gives you the confidence that comes with proven, factory-engineered components.

Colt's reputation in firearms manufacturing spans generations. Their bolt carrier groups carry that same commitment to durability and function. If you're serious about your 5.56 platform rifle, starting with genuine OEM parts is a smart move.

Specifications

Frequently Asked Questions

What 5.56 rifles is this bolt carrier group compatible with?

This Colt bolt carrier group is designed for any AR-15 platform rifle chambered in 5.56 NATO, including Colt models and most standard AR-15 builds from other manufacturers. It pairs with standard AR-15 upper receivers and charging handles.

Is this a Mil-Spec carrier group?

Yes, the Colt SP64028 is engineered to Mil-Spec standards for reliable performance and dimensional compatibility with AR-platform rifles.

Can I use this as a replacement or spare?

Absolutely. Whether you're replacing a worn component or building a spare upper assembly, this Colt carrier group gives you OEM reliability and proven function.