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!

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United Defense LLC
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Customer Reviews

Review by Ezell X.
Verified Buyer
Drop In replacement bolt group parts kit for my AR15.
Review by Arley S.
Verified Buyer
Received in four days after ordering. Will be back to shop from Keepshooting again.
Very Satisfied
Review by Isidore B.
Verified Buyer
bolt group parts kits look perfect. Exactly what I needed.
Quick Delivery
Review by Garrette S.
Verified Buyer
Best AR15 bolt group parts kit for the price sold by a terrific company. Thank you keepshooting!
Review by Aren H.
Verified Buyer
bolt group parts kits look great. Exactly what I needed.
Superb AR15 bolt group parts kit 5*
Review by Tige H.
Verified Buyer
Leading AR15 bolt group parts kit for the buck shipped by a terrific company. Thank you KEEPSHOOTING!
Review by Estevan J.
Verified Buyer
I purchased two of these bolt group parts kits. Used one for repair, other is stored in my spares box.
Great Price
Review by Kylee D.
Verified Buyer
These replacement parts are awesome. Would definitely recommend.
Review by Devine B.
Verified Buyer
Would Recommend this part
Terrific Price
Review by Derrill C.
Verified Buyer
Best price I could find that was in stock. Delivery was fast from Fedex.
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