Springer Precision PX4 Magazine Extension Kit

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Springer Precision PX4 Magazine Extension Kit w/Magwell 

The all-new Springer Precision mag well kit creates a wider opening for faster and more forgiving reloads, and includes a basepad and magazine extension to give you everything you need for carry or competition!  Purchase the accessories as standalone items or as a kit.

Kit Includes:

1 x Magwell, 1 x Extension, 2x Basepad

Mag well:

Base pad:


  • Available for compact and full size PX4s
    (fits 9mm and .40cal versions)
  • Does not fit subcompact or .45 models
  • Does not fit 10 round restricted magazines
  • ONLY compatible with new generation Springer Precision
    basepads and extensions
  • Extends Magazine .43”
  • No specialty tools or devices required
    to assemble / disassemble
  • Added traction on the front, back,
    and bottom, for better reloads


  • 17 round full-size mag:
    • Extends to the USPSA maximum 140mm
    • Increases capacity to 22 rounds
  • 15 round compact mag:
    • Increases capacity to 19 rounds
  • New mag spring included
  • Attachment mechanism substantially improved
    over previous Springer extensions

Installation Instructions

When installing the new spring and base plate in your magazine, do NOT use the factory mag catch plate.

  1. Disassemble magazine.
  2. Remove old spring from follower.
  3. Replace spring with NEW spring on factory follower.
  4. Compress Spring all the way into the magazine body.
  5. Slide the Springer Precision base plate into place and let spring release into magazine
  6. extension.
  7. Use small Allen key to turn set screw counter clockwise to lock extension in place


Lead Time:
If you can add it to cart, it is in stock and ready to ship!

DISCLAIMER: We recommend that this product as well as all other firearms parts & kits sold by Langdon Tactical be installed by a competent pistolsmith. No liability is expressed or implied for ANY damage or injury which may result from improper installation or use of this product. Installation of any firearm parts may limit or void the manufacturers warranty. We strongly recommend that the safety and operation of your modified handgun be thoroughly checked by an accredited gunsmith prior to use.

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  • 5
    It's some good kit

    Posted by Rich on Jan 25th 2024

    I bought my mag well kit for my compact carry in hopes it would get rid of that gap when using full size mags. It works. If you have a Compact, you'll only need the mag plates for the 15 rounders. Those are also well made. Just watch that lanyard loop piece when taking out. It WILL shoot across the room.. The YouTube instructions are pretty easy to follow. With the mag well installed, the gun looks super clean. Seems a little pricey, but worth the price. I'm very happy with it.