Daytona Tactical offers premium bolt carrier groups (BCGs) for both AR-15 and AR-10 platforms. Each ar15 bolt carrier is precision-machined from high-strength steel to ensure smooth operation and reliable cycling. Our BCGs are built to mil-spec standards, making them compatible with most AR-15 and AR-10 rifles.

Bolt Carrier Groups

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Frequently Asked Questions

What's the difference between a full-auto and semi-auto BCG?

A full-auto (M16) profile carrier has more mass at the rear and is the common standard — it's reliable in semi-auto rifles and legal to own (the carrier profile doesn't make a rifle automatic). A semi-auto carrier is lightened at the rear. Both run fine in a semi-auto AR; the full-auto profile is the more common, slightly heavier choice.

Which finish should I choose — phosphate, nitride, or nickel boron?

Phosphate is the mil-spec standard. Nitride (melonite) is harder and slicker with easier cleanup. Nickel boron (NiB) is the slickest and easiest to wipe clean. All are reliable — nitride and NiB are upgrades for smoother cycling and maintenance.

What do MPI and HPT mean?

MPI (magnetic particle inspection) checks the bolt for hidden cracks; HPT (high-pressure test/proof) fires an overpressure round to validate strength. Both are marks of a quality, tested BCG.

Will this BCG fit my rifle?

AR-15 and AR-10/.308 use different-size carriers — match the BCG to your platform and caliber. AR-15/M16 carriers fit standard AR-15 uppers; .308 carriers are larger-frame (DPMS-pattern).

Do you need an FFL to buy a BCG?

No. A bolt carrier group isn't the serialized part of the rifle, so it ships without an FFL.