Toolcraft Bolt Carrier Groups for AR-15 & AR-10 Rifles

Arm or Ally proudly offers one of the most complete selections of AR-15 Bolt Carrier Groups (BCGs) on the market—including the full lineup of Toolcraft Bolt Carrier Groups trusted by professional armorers, builders, and competitive shooters. Made in the U.S.A. and backed by a lifetime warranty, every Toolcraft BCG delivers proven reliability and Mil-Spec performance at a price that beats the competition.

Built for performance and dependability

Toolcraft BCGs are engineered from premium American steels and precision-machined to exacting standards. Each carrier and bolt is MPI-inspected, shot-peened, and high-pressure tested to ensure flawless cycling and long-term durability. Whether you’re building an AR-15, M16, or AR-10 platform, Toolcraft’s attention to detail guarantees dependable function in every environment.

Available coatings and finishes

Choose from 27 variations of Toolcraft BCGs at Arm or Ally, with professional-grade coatings that enhance performance and longevity:

• Black Nitride (BN): Smooth operation, easy cleaning, and outstanding corrosion resistance.
• Nickel Boron (NiB): Low-friction surface for slick cycling and reduced carbon fouling.
• Diamond-Like Carbon (DLC): Ultra-hard coating offering maximum wear protection and a mirror-like finish.

AR-15 and AR-10 caliber compatibility

Arm or Ally stocks Toolcraft BCGs for virtually every modern AR platform, including:

• 5.56 NATO / .223 Rem / 300 Blackout
• 6.5 Grendel (Type II) / 6.8 SPC / .224 Valkyrie
• .458 SOCOM / .450 Bushmaster
• .308 Win / 6.5 Creedmoor / .260 Remington (double-ejector options available)

Why Toolcraft from Arm or Ally?

When you buy a Toolcraft BCG from Arm or Ally, you’re purchasing directly from an authorized stocking dealer—ensuring genuine Toolcraft factory coatings and materials. We never sell re-coated or third-party-finished carriers that void the manufacturer’s coverage. Every BCG we ship comes with Toolcraft’s 100% no-questions-asked lifetime warranty.

Price match guarantee & dealer support

If you find a better price on a Toolcraft BCG, simply contact us with the link Price Match Request and we’ll meet or beat it. We also welcome established dealers—send us your FFL, business license, and sales tax permit for wholesale opportunities.

Shop Toolcraft BCGs at Arm or Ally

Explore the complete selection of AR-15 Bolt Carrier Groups, including Toolcraft’s Black Nitride, Nickel Boron, and DLC models—all in stock and ready to ship. Upgrade your next build with the best Toolcraft BCGs available, backed by lifetime support from Arm or Ally.