AB ARMS BOLT ASSEMBLY – 5.56MM AR-15 NICKEL BORON

Nickel boron coatings reduce friction and extend component life in demanding AR builds. Whether you're in Richmond or anywhere across California, upgrading your bolt assembly impacts reliability and cycling reliability. Understanding your build requirements starts with knowing state regulations—review California firearm laws before ordering components for your platform.

Nickel Boron Coating Benefits

Nickel boron plating creates a harder, slicker surface than standard phosphate finishes. This coating reduces bolt carrier friction, speeds carrier velocity, and minimizes fouling buildup during extended shooting sessions. The 5.56mm assembly handles standard velocity and specialty loads reliably. For shooters customizing AR platforms, component selection matters—each upgrade compounds reliability. Browse our California-compliant handgun catalog for compatible accessories and parts matching your build philosophy. Visit our gun shop in Sunnyvale for our full catalog.

Frequently asked questions

What is nickel boron coating and why does it matter?

Nickel boron is a hard metallic coating that reduces friction between bolt and carrier. It improves cycling reliability, speeds up the bolt carrier group, and resists corrosion better than standard finishes.

Will this bolt work with standard AR-15 upper receivers?

Yes. This 5.56mm bolt assembly is dimensionally compatible with mil-spec AR-15 uppers and carrier groups. Verify your gas system and barrel length for proper function.

How much does an FFL transfer cost in Sunnyvale?

See our pricing and fees page for current FFL transfer rates — TacticCAL keeps fees flat and transparent. TacticCAL is your gun store San Mateo in the Bay Area.