Guntec USA AR-15 / M16 Nickel Boron Bolt Carrier Group
Original price was: $169.00.$139.95Current price is: $139.95.
Elevate your AR-15’s performance with the Guntec USA Nickel Boron Bolt Carrier Group. Coated inside and out with nickel boron for corrosion resistance and durability, this BCG features 8620 tool steel construction for reliability. With a mil-spec bolt made from 9310 steel and properly staked gas key, it ensures superior performance and longevity. Magnetic particle inspected and made in the USA, this BCG is perfect for enthusiasts and professionals alike.
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Guntec USA M16 Bolt Carrier Group for .223/5.56 and 300BLK Nickel Boron Coated
Looking for a top quality, reliable bolt carrier group for your AR-15? Look no further than the Guntec USA Nickel Boron Bolt Carrier Group! This BCG is coated inside and out with corrosion-resistant nickel boron, ensuring superior durability and performance. It’s perfect for both the average shooter and the experienced gun enthusiast. Made from high quality steel, with an 8620-steel bolt carrier and a 9310-steel bolt, this BCG is built to last. The gas keys properly staked, and the extractor spring has an upgraded O-ring for more tension. Additionally, all surfaces are nickel boron coated for superior resistance to wear and tear. Lastly, get the Guntec USA Nickel Boron Bolt Carrier Group for outstanding performance and reliability in your AR-15! Also, the Bolts been magnetic particle inspected for proper strength and machining.
Guntec AR-15/M16 Nickel Boron BCG Specs:
- Mil Spec Carrier
- 8620 Tool Steel
- Full Auto M-16
- Nickel boron Coated
- Mil Spec Bolt
- 9310 Steel
- Magnetic Particle Inspected (MPI)
- Coated Nickel Boron
- Mil Spec Extractor
- 8620 Tool Steel
- Also, Nickel Boron Finish
- Extractor Spring
- Mil Spec Gas Key
- 8620 Tool Steel
- Grade 8 Hardware
- Properly Staked
- Nickel Boron Coated
- Weight: 11.6oz
- Made in the USA
- SKU: GT-BCG-NB
Nickel boron is an electroless coating applied to the bolt carrier group that produces a hard, slick surface on every contact point — the carrier body, bolt, cam pin, and gas key. The coating is self-lubricating, reducing friction between the carrier and the upper receiver and between the bolt and barrel extension without relying on oil to maintain smooth cycling. Carbon fouling sheds from nickel boron surfaces more readily than from standard phosphate, making post-range cleaning noticeably faster and easier. The bright silver appearance of nickel boron also makes it easy to visually inspect the BCG for carbon buildup during cleaning. The Guntec USA AR-15/M16 BCG is built to mil-spec dimensions and is compatible with standard AR-15 and M16 pattern upper receivers in 5.56 NATO and .223 Remington. For AR-15 owners who want the maintenance and friction-reduction benefits of nickel boron at a competitive price point, the Guntec USA nickel boron BCG is a practical upgrade over a standard phosphate bolt carrier group. Pair it with a Tiger Rock AR-15 Charging Handle, and browse our full AR-15 Bolt Carrier Groups selection for other options.
| Weight | .725 lbs |
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Frequently Asked Questions
What is the advantage of nickel boron over phosphate on a BCG?
Nickel boron provides a self-lubricating surface that reduces friction between the carrier and upper receiver, allowing the BCG to cycle smoothly with less oil than a phosphate-finished carrier. Carbon fouling also sheds more easily from nickel boron, making post-range cleaning faster and less labor-intensive compared to a standard mil-spec phosphate BCG.
What upper receivers is this BCG compatible with?
The Guntec USA AR-15/M16 nickel boron BCG is compatible with standard AR-15 and M16 pattern upper receivers in 5.56 NATO and .223 Remington. It uses mil-spec carrier and bolt dimensions and is a drop-in fit for any mil-spec AR-15 upper receiver.
Does this BCG include the bolt, cam pin, firing pin, and retaining pin?
Yes. A complete BCG includes the carrier, bolt, cam pin, firing pin, and firing pin retaining pin — all components needed to drop into an upper receiver. Confirm the specific contents with the product listing, as “complete” BCG configurations can vary slightly between manufacturers.
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