Colt M4/AR15 Receiver Extension Castle Nut

Colt M4/AR15 Receiver Extension Castle Nut

Colt
SKU:
9390020
$9.95
(34 reviews)
Current Stock:
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Description

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

Additional Information
Previous Part Numbers:
64069
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Reviews

  • 5
    A+

    Posted by jv on 11th May 2020

    A+

  • 5
    Great replacement

    Posted by Pedro Suarez on 5th May 2020

    If your building a new build or replacing an old existing part, look no further, this is what you need.

  • 5
    Colt castle nut

    Posted by Charles E. on 26th Aug 2019

    Quality part; fit and finish is perfect. Colt's has the notches for proper staking of the end plate. As always, great AU service!

  • 5
    Colt Receiver Extension Castle Nut

    Posted by Michael Wiseman on 2nd Apr 2019

    My Colt castle nut was shipped fast and is typical Colt quality. AU is my go to for Colt products.

  • 5
    Colt quality, great price

    Posted by Mark on 13th Mar 2019

    High quality mil-spec part. A.U. Great company.

  • 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.