Colt M4/AR15 4-Position Receiver Extension

(13 reviews)
Current Stock:

Factory Colt 4-position receiver extension for M4/AR15 type rifles.


  • 5
    Love it

    Posted by Andy on 3rd May 2023

    Exactly like the picture and the description. Fast shipping & great product.

  • 5
    Keep it Colt

    Posted by John Pipolo on 16th Oct 2022

    ArmsUnlimited is an excellent source for authentic Colt’s parts. Whether you’re working on a clone or your old standby Car-15.

  • 5
    No hassle

    Posted by Michael DiBetta on 27th Oct 2021

    Just want to say. Thank you for quick shipping and verification.

  • 5
    4-Position Receiver Extension

    Posted by Bob Tallman on 17th Jun 2021

    quality product, as described, fast shipping

  • 5
    Colt receiver extension

    Posted by Michael on 13th May 2021

    Appears genuine colt, has the real colt 4 position. Replaced a six position on an old colt lower that wasn't genuine colt. Trying to stay a little authentic.

  • 5
    High quality Colt extension tube

    Posted by Randy on 16th Aug 2020

    I am just glad that I grabbed a couple.

  • 5
    nice find

    Posted by Isaiah Frazier on 23rd Jan 2020

    Good price on hard to find Colt part

  • 5
    Colt Buffer Tube

    Posted by Jeremy Boehm on 2nd Oct 2018

    The part met my expectations for a quality Colt Component. You just can’t go wrong with Colt!

  • 5
    Great as expected

    Posted by z on 4th Sep 2018

    Great as expected