AR-15 Bolt Assembly – Brand New, MIL-SPEC AR-15 Bolt Assembly

AR-15 Bolt Assembly

Our brand new, MIL-SPEC AR-15 bolt assembly is guaranteed to fit in your MIL-SPEC AR-15 while offering optimal performance. Each features a Teflon®-based coating designed to eliminate bind on bearing surface, which has been shown to eliminate reliability issues. Additionally, they are machined to strict tolerances with the intent to provide a drop-in fit with no gunsmithing required.
SKU N8448509

Description / AR-15 Bolt Assembly

The AR-15 bolt assembly is, as are all of our house brand spare and replacement parts for the AR-15 platform, a brand new part produced in a state-of-the-art manufacturing facility that holds several foreign military contracts. As such, all parts are compatible with and interchangeable in any MIL-SPEC AR-15.

Located within the bolt carrier group, the AR-15 bolt assembly is an essential component that facilitates the firing sequence, as it is responsible for extracting spent cartridges from the chamber and ejecting them from the receiver as well as stripping and inserting fresh cartridges. This is accomplished as the bolt carrier group is cycled back and forth between each discharge, pushed to the rear by expanding propellant gases and thrust forward by the buffer assembly and recoil spring. It is secured within the bolt carrier group via the bolt cam pin.

  • Made from 9310 Steel
  • MPI - Magnetic Particle Inspected
  • Shot Peened
  • 100% Made in the USA
  • H&M Black Nitride Treatment for Deep, Smooth Black Nitride Finish
  • Includes Bolt, Extractor Assembly, Ejector Assembly, and Gas Rings

More Information

Manufacturer United Defense LLC

Customer Reviews

Good Bolt at a Good Price
Review by
I've ran this bolt for several hundred rounds in a couple different bolt carriers with no issues. It is a good mil-spec bolt assembly and a good value. Combine this with a bolt carrier and firing pin and you have a nice budget BCG. Would buy again.

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