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AR-15 Bolt Carrier Group
Nickel Boron Finish
24 in stock
Overview
When it comes to your AR-15's bolt carrier group, reliability is key; that's what you get with RISE Armament's advanced Nickel Boron Bolt-Carrier Group (BCG): reliability.
At RISE, we manufacture each of our bolt carrier groups with precision. We also individually inspect each one to ensure high-level performance. Our signature AR-15 Bolt Carrier Group is available in two finishes. The first finish is a black nitride. However, the one we're focusing on here is our nickel boron coating, which reduces friction and also improves overall performance.
So why is nickel boron so great? For that, here's a little science. Nickel boron (NiB) is a columnar-formed compound. It's about 95 percent nickel and 5 percent boron. Due to its formation, it reduces contact points between surfaces. However, it still provides an additional layer of hardness to the steel. Because of the reduced surface contact—given only the rounded ends of the NiB column's touch—it acts almost like a lubricant.
What does this all mean as it relates to our nickel boron bolt carrier group? Compared to standard chrome, nickel boron provides more resistance to wear and corrosion; that's important because it means you get a bolt carrier group built to last much longer than anything else you'll find on the market. Longevity is exactly what you want from your bolt carrier group. The end result from our work is an 11.6-ounce bolt carrier group that we've tested every possible way to withstand whatever you throw at it. In case you were wondering, here's a look at exactly what makes up our nickel boron BCG.
- Bolt: 9310 MPI tested
- Carrier: 8620 tool steel heat treated and case hardened
- Gas key: tool steel - grade 8 hardened fasteners and staked properly
- Cam pin: 4140 steel
- Extractor: tool steel – shot peened
Key Features
- Unit weight: 11.6 oz.
- Individually MPI tested
- Bolt: 9310 MPI tested
- Carrier: 8620 tool steel heat treated and case hardened
- Gas key: tool steel - grade 8 hardened fasteners and staked properly
- Cam pin: 4140 steel
- Extractor: tool steel – shot peened
Customer Reviews
Based on 5 reviews
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S
Excellent bcg
I purchased this and unfortunately had an issue but I understand that the world isn't perfect (that's why we need bolt carrier groups). Amazingly after one quick phone call I had a replacement on my doorstep in a couple days.
The product: looks great and operates smooth as silk. Can literally feel the difference cycling the action. Shoots phenomenally.
The company: phenomenal customer service. I'll be a life long customer.
10 out of 10 can't recommend enough.
J
Totally awesome ![User picture]()
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The addition of the bolt carrier group along with charging handle, blitz trigger, and compensator has turned my S&W M&P 15 a totally awesome rifle
H
Amazing bcg
Super smooth and fast great accuracy
R
Great bolt carrier group
This NIB is naturally slicker than all the other NIB BCG’s I’ve ever owned and it’s staked properly. All the other name BCG’s are about the same color and texture but this one actually looks the same as an actual nickel in your pocket.
C
Nickel boron coated AR-15 BCG ![User picture]()
So far fired 200 rounds threw it in my bushmaster AR-15 with a Timney trigger 3lb n a fortis red 5.56 brake without zero issues as expected only thing that gots me is on the extractor the spring n the little metal piece are not actually connected to the actual extractor but seems to work fine my old BCG on my bushmaster and my colt AR-15 both are connected to the extractor key itself
