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AR-15/M16/M4 Full Auto Fire Control Group FCG Parts Kit


Lower Receiver Parts Kit AR-15/M16/M4 plus Auto Sear and Pin. All of the parts included in the lower parts kits are investment cast or otherwise machined to Mil-Spec drawings, materials, and heat treat. American made parts for the AR platform.


These lower receiver parts are what you will need to convert your post 86 sample to full auto or keep your pre 86 sample running in tip top shape. USA manufactured contract over run M-16 Parts to replace your used parts with new mil-spec parts. This kit is intended to replace full auto parts in a registered full auto lower.

  • 1 – Auto Selector/Safety
  • 1 – Auto Disconnector, M16
  • 1 – Disconnector Spring
  • 1 – Auto Trigger M16
  • 1 – Trigger Spring
  • 2 – Trigger Pins
  • 1 – Hammer M16, Mil-Spec w/J Spring
  • 1 – Hammer Spring
  • 1 – Auto Sear W/Spring M16
  • 1 – Auto Sear Pin M16

Caliber: .223/5.56

Finish: Manganese Phosphate

***NOTE: These LPKs can be legally sold to retail consumers, dealers or manufacturers and are meant to be used as replacement parts for registered receiver weapons and post sample builds only. All NFA Rules Apply and Aegis Cerakote & Gunworks, LLC will not be held liable for any illegal use or misuse of this product nor will we provide any legal advice as to your city, county, or state regulations on possession of this product. ALL NFA RULES APPLY – This kit will not convert your AR15 Semi-automatic to full auto function and attempting to do so without the proper license is a violation of Federal law!***