GLOCK G21 13-round .45ACP Pistol Magazine

(55 reviews)
Current Stock:

GLOCK G21 13-round .45ACP Pistol Magazine


This is an OEM factory new/original drop-free 13-round .45ACP magazine for your GLOCK G21. Glock magazines have a hardened steel insert encased in high tech polymer. This polymer coating protects the magazine & prevents deformation, even when dropped from a great height.


  • Constructed of stiff metal encased in GLOCK polymer
  • Viewing windows for each cartridge for visual confirmation
  • GLOCK factory replacement magazines
  • Double-stack design


  • 5
    Arms Unlimited Strikes Again!

    Posted by Rob on 19th Jul 2022

    Just in the nick of time they shipped out a slew of magazines for my state's new ban on standard capacity magazines. Excellent quality as expected, works flawlessly!

  • 5
    Great!!!! Mag for Great!!! Price

    Posted by Unknown on 24th Oct 2020

    Magazine was just as advertised

  • 5
    Glock 21 mags

    Posted by al Mason on 8th Oct 2020

    As advertised, reasonably priced, quickly shipped.

  • 5
    Fast shipping!

    Posted by Ryan H. on 28th Sep 2020

    Fits my G21 .45acp perfectly.

  • 5
    GLOCK G21 13-round .45ACP Pistol Magazine

    Posted by Kevin Baldwin on 23rd Jul 2020

    great response time and mags work great

  • 5
    Great factory Mags, great price, great service

    Posted by dorian jumper on 27th Apr 2020

    Purchased these with the intent on matching them with the KRISS Ex2 extensions. Works great cause I now have 150 round capacity on my person if I so choose. Couple that with a G21 in a B&T chassie, KKM comp barrel combo, and a ACRO P-1. Then I'd say youre in for a sweet ass time at the range, or any occasion calling for a hail of .45.

  • 5
    Took a while but worth the wait.

    Posted by Jason on 4th May 2019

    I ordered a couple of these during the Million Magazine March here in California. They had to be back ordered but AU came through like they promised. Thanks AU for supporting us in CA.

  • 5
    Nice mag

    Posted by pete sehremelis on 28th Nov 2018

    Nice Glock mag. Highly recommend!!

  • 5
    G21 13 round magazine

    Posted by Ronald Umbright on 5th Nov 2018

    Item as described, fast shipping, will likely be ordering more from them.