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AR15 BOLT CARRIER GROUP 5.56X45MM NITRIDE MP Reviews & Ratings

AR-15 BOLT CARRIER GROUP 5.56X45MM NITRIDE MP

Whether you're looking to finish off a new AR-15 build or you need a spare bolt-carrier group to have on-hand as a ready replacement (always a good idea), Brownells has you covered with its AR-15 Bolt Carrier Group. This ready-to-roll BCG is built to provide dependable operation in any AR-15 chambered in 5.56 NATO, .223 Remington or 300 Blackout. Each Brownells AR-15 Bolt-Carrier Group features a bolt machined from 9310 tool steel, which is heat-treated and shot-peened. The carrier itself is machined from 8620 hardened steel. Both of these components, as well as every other part in the bolt-carrier group, are finished in a nitride coating. Every bolt is magnetic-particle inspected and features a torqued-and-staked gas key. With each Brownells AR-15 Bolt-Carrier Group, you'll receive the bolt, bolt carrier, gas key, firing pin, cam pin, firing pin retaining pin and an extractor with the necessary spring and rubber insert. This bolt-carrier group will work with any cartridge based on the 5.56 NATO case, and it is not designed for use in full-auto lower receivers.

SPECIFICATIONS:

Carrier Material: 8620 Hardened Steel
Bolt Material: 9310 Tool Steel, Heat-Treated and Shot-Peened
Finish: Nitride Coated
Magnetic-Particle Inspected
Torques and Staked Gas Key
5.56x45mm NATO
Not Designed for FullAuto

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5 Stars

92%

4 Stars

3 Stars

2 Stars

1 Stars

Reviews Summary

Customers are highly satisfied with the AR15 BOLT CARRIER GROUP, praising its excellent quality, reliability, and fair pricing. Many highlight its seamless performance with no issues reported. The customer service from Brownells is frequently mentioned as excellent, contributing to a positive purchasing experience. Overall, a trusted choice for AR replacements.

What Reviewers Are Saying

Product Quality

85%

The quality of the AR15 BOLT CARRIER GROUP is frequently praised, with many reviewers highlighting its reliability and excellent craftsmanship. Users express satisfaction with its performance, noting that it runs smoothly and holds up well under various conditions.

Customer Service

65%

Brownells' customer service receives positive feedback, with users appreciating quick responses and helpful information about products. This aspect significantly enhances the overall purchasing experience, leading to customer loyalty.

Reliability and Performance

80%

Many reviews highlight the product's exceptional performance during use, with users reporting no malfunctions after firing numerous rounds. This reliability is a common theme that encourages buyers to return for additional purchases.

Pricing and Value

75%

Reviewers mention that the price is competitive, with many considering the product to be an excellent value for its quality. This value for money aspect contributes to positive buying decisions and repeat purchases.

Delivery Experience

70%

The timely arrival of the product is consistently noted, with many customers pleased about receiving their orders without delays. This prompt delivery enhances customer satisfaction and reflects well on the retailer.

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Klingklang

Excellent transaction. Right part, good price and timely. Will definitely return if I need more replacement parts.

by Fred Ahrens on February 10, 2025

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At bolt carrier

Works as advertised, just ran 60 rounds without a hitch and no wear.

Would you recommend this? Yes, I would recommend to a friend

by THOMAS FOTI on December 09, 2024

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Bolt carrier group

Easy to use and install, it is a backup that I will drop in for a few thousand rounds and then switch.

Would you recommend this? Yes, I would recommend to a friend

by KEITH NAHLOVSKY on August 13, 2024

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Buy all that you need of these

These are superb quality for the price. Phosphate and chrome are fine and I run mine pretty wet but these are some of the nicest Nitride ones I've seen for the price.

by Jon Cryor on October 28, 2023

Verified Purchase

Was this review helpful? 5

Excellent BCG for the money!$

Arrived on time, no issues. Very happy with my purchase.

by NESTOR GONZALEZ on October 02, 2023

Verified Purchase

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Good product

Works fine looks well made so will buy again

Great product

Great fit, fired, locked, and ejected cartridge flawlessly

Fine looking BCG !!

Fine looking BCG !! I have bought from Brownells for many decades and always been very satisfied with their excellent products and services. I haven't shot this yet, but I'm sure it too will serve me very well. Thanks very much, Brownells !!

Great BCG

Good metal work, no errant shavings or fillings and this S/A version clears the sear block in my early 90s Coltthanks to great Brownells customer service on my question. Havent had a chance to range test, but I agree with other reviewers that this should last quite a while. Thanks again.

Nothing bad to say

Slick black finish, runs smoothly in the receiver. Should last a long time.