Basepad, for Glock HiCap Extended Magazines, Tool-less Design, by Dawson Precision

49 Reviews
Dawson Precision
40 SW
Glock Standard
Glock Compact
Glock Subcompact
Glock Competition
Glock Long Slide
Perfect Impact Guarantee


  • Get 22-23 Rounds in 9mm
  • Get 19-20 Rounds in .40 SW
  • Comes With Extra Power Mag Spring Included
  • Dawson Precision Legendary Tool-Less Design
  • CNC Machined From Aircraft Aluminum
  • Fits full size 9mm & 40 S&W mags only
  • Will not work with 10 rnd mags


DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK.


Write A Review
  1. Best Extension Around

    Posted by Jay Brassine on Jul 31st 2020

    Been using these for years. May take a little modification to your follower but even that is simple sanding. Use them for IPSC matches and edc. Can't say enough about how well these have held up. Even my oldest extensions are in great shape. Never experienced a failure of any kind. The extensions lock onto the base of the mag perfectly but are still easy enough to remove for cleaning and maintenance. The spring holds its K value even after years of use and being loaded nearly full time. Definitely a buy.

  2. HiCap Glock Mag Base

    Posted by BG on Apr 21st 2020

    Using this product for work and competition. Great design and Dawson Precision remains one of the best customer service.

  3. Hi cap basepad

    Posted by Mike Spacucello on Jan 31st 2019

    Easy to put on. Nice fit with the ice magwell

  4. Glock Extended Basepad

    Posted by Jim on Jan 24th 2019

    The plastic tabs on my old Arredondo extensions started breaking, and I looked around for solid replacements. These extensions were recommended by PressCheck via P&S. The high quality extensions and springs are exactly what I was looking for.

  5. Best Design on the Market

    Posted by marc bettencourt on Nov 27th 2018

    No tools required, easy to clean, fits all Glocks to include the 19X.

  6. mag extension

    Posted by Tony on Nov 12th 2018

    these mag extensions rock! I bought more for duty use.

  7. Awesome

    Posted by Tony on Sep 2nd 2018

    Wow the fit and finish is fantastic. I got this for my Glock 35 I'm using in USPSA Limited division. It takes my 15 rnds to 19 sometimes 20 rnds. I love the fast shipping also

  8. Slick Design

    Posted by Raphael on Aug 21st 2018

    I purchased this mag extension for Open class with my G17 in MOS. While removing the stock base plate required a tool, the Dawson extension slipped right on and then locked in place. I appreciate the replacement spring and fit 23 rounds of 9mm in the 17 round mag.

    I have yet to compete with this but expect it to function flawlessly. Admittedly, I am a fan of Dawson as I also have their fiber optic suppressor hight sights installed as well.

    Ordering was easy, the price was right, and shipping was quick with automated shipping and tracking information included.

  9. Design was really think through

    Posted by Rodel on Aug 21st 2018

    Fast easy to install looks great very reasonable price the best of the best. I highly recommended. The design is insanely genius.