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M16 5.56 BOLT ASSEMBLY NITRIDE MP Reviews & Ratings

The Brownells M16 5.56 Complete 9310 Bolt Assembly is built to withstand heavy-duty use in both semi-auto AR-15s and full-auto M16 rifles and features construction and testing that ensures high-quality performance. The Brownells M16 5.56 Bolt Assembly is constructed entirely from 9310 steel, which is designed to provide the elements needed to perform during rugged duty use.

Material quality checked with magnetic-particle inspection
Extractor includes spring and rubber insert
Optimized for use with all 5.56-NATO-based cases

The Brownells M16 5.56 Bolt Assembly includes bolt, gas rings, extractor and ejector installed.

See all of our AR15s and AR15 parts here.

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5 Stars

91%

4 Stars

3 Stars

2 Stars

1 Stars

Reviews Summary

The M16 5.56 Bolt Assembly Nitride MP is praised for its exceptional value and quality, with many users satisfied with its performance in various applications. However, there are concerns about quality control, as one reviewer noted a manufacturing issue. Overall, it's recommended as a reliable backup bolt for enthusiasts and professionals alike.

What Reviewers Are Saying

Product Quality

70%

Reviewers frequently highlight the quality of the M16 5.56 Bolt Assembly, with many expressing satisfaction regarding its performance and construction. The product meets expectations for both backup and primary use, indicating strong adherence to quality standards for most users.

Value for Money

60%

Many customers consider the product to offer great value for the price, particularly noting its affordability without compromising quality. This theme resonates strongly among users who appreciate the combination of performance and reasonable cost.

Shipping Experience

50%

Several reviews mention prompt shipping, contributing positively to the overall customer experience and satisfaction. Quick delivery is a highlight among reviewers, indicating a reliability in service that enhances the purchasing process.

Quality Control Issues

20%

A few reviewers raised concerns about quality control, specifically mentioning instances of poor machining that led to product replacements. This highlights a gap in quality assurance for some components, suggesting the need for consistent checks before shipping.

Usage Experience

40%

Customers report positive experiences with the bolt during tests and operational use. Reviewers share successful performance in various firearm setups, indicating its versatility and reliability in both casual and competitive settings.

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Bolt 5.56mm Assembly

Purchased this Brownells Brand 5.56mm Bolt Assembly as a spare,appears to be well made.I have not used this bolt as of yet.

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

by WILLIAM J. on July 25, 2025

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Bolt

An MP bolt at an affordable price. Shipped quickly. 5 Stars.

by EDWARD M. on July 10, 2024

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Good bolt for the money

Bought this an an extra bolt. Seems like good quality. Haven't used it yet. will try it out when I get to the range next time.

by Thomas P. on May 19, 2024

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Solved a problem

Used it to replace a bolt with extractor issues. Worked perfectly.

by RICHARD C. on February 28, 2024

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Great backup

Tested with my .300 blackout. Shot great, nice finish on the bolt.

by JOSHUA S. on February 19, 2024

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.223/5.56 bolt

its a great bolt, not cheaply made, will buy another when needed.

by JOSHUA C. on October 14, 2023

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Good Bolt

Primarily a back up bolt. Does work well with what I have. I would recommend this bolt to others.

M16 BOLT ASSEMBLY 5.56X45MM NITRIDE MP

Great Value, outstanding quality, have one as a spare if you are a competitor or tactical LEO or military. Easiest and quickest way to replace a broken extractor is replace the bolt.

All of them work well

These were installed on Superlative piston kits for multiple AR pistol builds for LEOs. They have reported back their satisfaction with the functioning of their weapons

M16 bolt

Wow,super hi quality bolt for the price!