Colt AR15/M4 Mil-Spec Fire Control Parts Kit

(10 reviews)
Current Stock:

All factory Colt mil-spec fire control parts needed for the AR15/M4 semi-automatic rifle.


  • Trigger
  • Trigger Spring
  • Disconnector
  • Disconnector Spring
  • Hammer
  • Hammer Spring
  • 2 x Hammer/Trigger Pins


  • 4
    Colt mil spec fire control parts kit

    Posted by Peter Agozzino on 26th Nov 2023

    It was missing the disconnect spring

  • 5

    Posted by Timothy C Thrower on 17th Nov 2022

    Fast shipping! Great product!!

  • 5

    Posted by Clarke Thrower on 18th Sep 2022

    Product was as described and shipping was really fast!! A+++

  • 5
    Colt OEM AR15 / M4 Mil-Spec Fire Control Parts Kit

    Posted by Doc Buddha on 12th Sep 2022

    The great thing about Arms Unlimited / AU, is that they always come through and have never misrepresented parts or items we have purchased through them. They created dealer wholesale accounts for FFLs to grow and supply many Colt items that are hard to get. They fill a big Nitch. Last, they are what is represented, COLT Genuine Parts.

  • 5
    Colt AR15/M4 Mil-Spec Fire Control Parts Kit

    Posted by Brent on 29th Aug 2022

    Item was exactly as described at a good price. Shipping was fast!

  • 5
    The Best

    Posted by Happy Customer on 30th Jul 2022

    Waited to find a genuine Colt Parts since most of the other stuff I have tried has been junk. Goes together tight and looks great. I have built at least 20 lowers over the years and Colt is the best.

  • 5
    Colt parts

    Posted by Jim on 25th Feb 2022

    Best prices and service!

  • 5
    Legit Colt spares kit

    Posted by Hans on 22nd Jul 2021

    Amazing product , 100% colt.

  • 5
    Colt Fire Control Parts Kit

    Posted by Logan M. on 9th May 2021

    Bought it, arrived in Colt parts baggie, looks good. Hope to use soon, haven't installed.