Now is the time to stock up on AR-15 Bolt Parts that you may need to keep your rifle running. We've paired the most common field replaceable parts into one value priced kit to give our customers the best option in spare parts. All parts are produced to MIL-SPEC standards and will function in any .223/5.56 caliber AR15 rifle.

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 American Owned and Operated

20+ Years In Business


Each AR-15 Bolt Parts Kit Includes:

  • Extractor (P/N: 8448512)
  • Extractor Spring (P/N: 8448755SP)
  • Extractor Pin (P/N: 8558513)
  • Firing Pin (P/N: 8448503)
  • Firing Pin Retainer (P/N: 8558504)
  • Bolt Gas Ring (3) (P/N: 8448511K)
  • Ejector (P/N: 8448515)
  • Ejector Pin Spring (P/N: 8448516)

Looking for M16 Full Auto Parts?  We've got M16 Hammer, M16 Trigger, M16 Selector, M16 Disconnector, and M16 Auto Sear Assembly for sale!

More Information

United Defense LLC
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Customer Reviews

Review by Johnphilip G.
Verified Buyer
Review by Cleophas Q.
Verified Buyer
Parts look good. Exactly what I wanted.
Good for my use
Review by Theordore K.
Verified Buyer
Received in three days after ordering. Will be back to shop at keepshooting again.
Very Satisfied
Review by Arrion J.
Verified Buyer
Pleased with this order.
Just as pictured.
Review by Micah Y.
Verified Buyer
These AR15 bolt group parts kit are excellent. Would definitely buy again.
Great Company
Review by Jhalil E.
Verified Buyer
Price is excellent and shipping was quick.
very good deal....
Review by mark
Verified Buyer
being new to the AR platform, I had to buy these just in case..... price was just $6.24, so I could not pass up the deal ..... Thank you keepshooting.com for having good deals.....
Good for me
Review by Sebastian Q.
Verified Buyer
Best price I could find that was available. Delivery was speedy with Fedex.
Very Pleased
Review by Dameion W.
Verified Buyer
Drop In spare bolt group parts kit for my AR15.
Very Pleased
Review by Remi R.
Verified Buyer
These AR15 bolt group parts kit are good. Would definitely buy again.

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