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Bolt Carrier Groups

Nickel Boron M16 BCG (5.56 / .300 BLK)

FREE SHIPPING on orders of $399 or more

SKU OH-UBC02UPC 850078799098

Close-up of a stainless steel firearm bolt carrier group showcasing precision craftsmanship and reliable design.

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  • Limited Lifetime Warranty
  • Made in the U.S.A.
Details

Specifications

Upper
Bolt9310 Tool Steel
Other
Carrier8620 AQ Steel
Heat TreatmentFull MIL-SPEC
InspectionMagnetic Particle Inspection (MPI)
LugsBack of lugs chamfered for reliability
ExtractorS7, with spring, insert & O-ring installed
FinishFull Nickel Boron finish
Gas KeyStaked, with Grade 8 fasteners
ProfileM16 cut
Upper
Forward AssistSerrations
Other
Materials100% Made in America
Barrel
Caliber5.56mm NATO, .300 BLK
Customer Reviews

Reviews

Real feedback from customers who have experience with this product.

5.0
★★★★★
1 review
Robert M. Sep 04, 2026
★★★★★

I used this BCG for a 7.5 in 300 blk build and it preformed flawlessly

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About

Nickel Boron M16 BCG (5.56 / .300 BLK)

Dominate any range with this precision-crafted M16 Bolt Carrier Group (BCG). Designed for seamless compatibility with 5.56 NATO and .300 Blackout, this BCG ensures flawless cycling and extraction in any build. Every component is treated with a premium nickel boron finish for exceptional corrosion resistance, ultra-low friction, and effortless cleaning, delivering smoother operation than standard coatings. Built to exacting Mil-Spec standards, it’s the ultimate choice for reliability and performance.
Precision-machined 9310 steel bolt and 8620 steel carrier, fully nickel boron coated Compatible with 5.56/.223 and .300 Blackout barrels for versatile performance Full nickel boron finish for superior lubricity and wear resistance

Compare all four finishes in the AR-15 BCG guide.

Mil-Spec construction with staked gas key and shot-peened bolt for rugged reliability Elevate your AR15 build— order now!

Nickel Boron M16 BCG (5.56 / .300 BLK) questions

Does it ship free?

Orders of $399 or more ship free.

Is there a warranty?

Yes. One Horse backs it with a Limited Lifetime warranty.

Ready when you are

Get your Nickel Boron M16 BCG (5.56 / .300 BLK)

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Free shipping on orders of $399 or moreLimited Lifetime warranty

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MSRP: Original price was: $135.99.Current price is: $129.99.

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Financing available on orders $600+ with Credova