Colt M4/AR15 Receiver Extension Castle Nut

Colt
SKU:
SP64069
$9.95
(29 reviews)
Current Stock:

Factory Colt receiver extension castle nut for M4/AR15 type rifles.

Reviews

  • 5
    First Purchase

    Posted by Randy Ciuros on 5th Jan 2019

    I needed an extra castle nut, preferably Colt brand, and Arms Unlimited had it at the best price, with free shipping to boot.

  • 5
    Colt Parts

    Posted by Thomas R Griffith on 25th Dec 2018

    Always top notch parts, AU always efficient with fast service.

  • 5
    Colt M4/AR15 Receiver Extension Castle Nut

    Posted by Marty on 19th Nov 2018

    AU sells authentic Colt parts and the Colt M4 Receiver Extension Castle nut is no exception. Castle nut was brand new. The exceptional things about AU are their customer service, best prices on Colt products, fast shipping and no tax!

  • 5
    More Colt parts.

    Posted by Eric McKeown on 10th Jul 2018

    Nice to be able to buy individual lower parts with free shipping.

  • 5
    Great for a AR build

    Posted by Ed W on 9th Jul 2018

    I order this castle nut along with a Colts lower parts kit to complete a Colt lower receiver build that I'm working on. Fast shipping and good price from Armsunlimited.

  • 5
    Exactly what I needed

    Posted by Garrett Schmidt on 11th May 2018

    Fast shipping, product was perfect.

  • 5
    Colt M4/AR15 Receiver Extension Castle Nut

    Posted by John Gilbarty on 28th Apr 2018

    Super Service, Excellent Product, Great Prices/

  • 5
    Colt castle nut

    Posted by Aaron Barentine on 26th Dec 2017

    Probably could have gotten a generic for cheaper but wanted to stay with Colt OEM Parts. Good price and very fast shipping. A good company to buy from.

  • 5
    Colt

    Posted by SanchoPanza on 10th Nov 2017

    For A4 Lower