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Chen SI "Shooter Installed" Magwell

MSRP: $184.99
Now: $149.99
( saved $35.00 )
323 reviews Write a Review
All previously placed orders of Blued SI Magwells will ship on September 29th. Blued SI Magwells will be back in stock on October 2nd in limited quantity.
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  • Manufactured in the USA

Simple installation by shooters - No gunsmithing needed!

The SI Magwell is the latest addition to the Stan Chen Custom Magwell family. It delivers greatly enhanced reloads, elegant design and maximum durability.

Solid, one piece construction.

Large sculpted funnel for dramatically faster reloads. Through careful CAD design, every last millimeter of available real estate was turned into reload-enhancing surface area.

Designed to very nicely match the beveled magazine wells commonly found on current production 1911s, such as Springfields, Kimbers, Dan Wessons and current Colts (2018 production with fully beveled magazine well) .

Most Colts made prior to 2018, and other frames without full magazine bevels, will require minor blending. (See pictures above). We offer a "Blend Kit" to facilitate this (located under "Accesories").


Eliminates sharp frame corners. Unique funnel profile eliminates sharp edges at front of magazine well opening on the frame. Smoothing of all surfaces on the entire part yields total carry comfort.

Low profile roundbutt. Flowing design. The lines of the entire magwell were designed to flow well with the pistol, giving the bottom of the pistol a cohesive, custom look.


Custom quality checkering. Equaled only by the very best gunsmiths. Perfectly formed diamonds, row after row. Even at 20x magnification. Enhances recoil control.

One-Piece Durability. Precision CNC machined from a solid block of heat treated steel. No joints or screws to work loose, ever.

Made in-house at Stan Chen Custom, Durango, CO, USA

How to Install the Chen SI Magwell

323 Reviews

  • 5
    Stan Chen SI Magwell

    Posted by Adam on 16th Aug 2023

    Fits perfectly and tapers just right to line up with Springfields. Definite upgrade. Buying a 2nd soon.

  • 5
    SI Magwell

    Posted by Steve Eberhardt on 16th Aug 2023

    Very nice work. I appreciate the precision and detail that went into making this magwell. It looks like it was made for NASA.

  • 5
    Chen SI Magwell

    Posted by Mark V on 8th Aug 2023

    Outstanding product. I've been shooting some practical shooting competitions at a few local clubs and found that I occasionally had slow mag changes with stock equipment. The Chen SI well is not obtrusive, it's the perfect size, and does the job, speeding up mag changes and eliminating time-burning hangups. Installation was a breeze, quality and fit perfect. I've seen a few others and although they're a bit less expensive, this product is a great illustration of "you get what you pay for". Top shelf all the way. Easy installation, couldn't be happier.

  • 5

    Posted by Jim Kelly on 8th Aug 2023

    I love the magwell/spring housing however, I accessed your video on how to install it and there was a much better way to install it that does not include removing the safety levers. There’s another video out there I used where you simply remove the grips and double up some rubber bands and wrap them around the grip less handle where they hold the back strap safety down. Then you you can remove the spring housing, swap the spring and catch pin (if there is a catch pin, mine didn’t have one) and slide the new unit in place and replace the holding pin. Replace grips and it’s done. Check out the video on YouTube.

  • 5
    Beautiful machine work

    Posted by JC on 8th Aug 2023

    I ordered an ACW Prime with no magwell, that was a mistake. Thankfully I was able to correct it myself with this beautifully machined magwell that swapped right out. Thanks Mr. Chen!

  • 5
    Excellent Magwell

    Posted by Steve M on 1st Aug 2023

    Beautiful, quality workmanship, easy no-fitting installation on my Springfield Ronin, blends nicely.

  • 5
    SI magwells

    Posted by Jay Beshears on 25th Jul 2023

    I have have purchased and installed three of these. Two on Dan Wessons and one on Colt. They all fit very well. Will be ordering more. Make a very good looking firearm with the magwell grips.

  • 5

    Posted by Christopher Rickman on 20th Jul 2023

    From design to production quality to fit and finish this magwell is absolutely impeccable. It installed with no fitting necessary, and looks like it was custom blended to my gun. Customer service is fast and friendly too. I will be ordering more for all my 1911s

  • 5
    SI Magwell

    Posted by Jim on 17th Jul 2023

    Quality Product when I opened the package. Took about a half hour to install. Would rate it after the install 99 0ut of 100. Does not line up all the way on the sides on the magwell along the frame. You have to be "looking" it and it might be the frame and not the magwell. That being said. Would still absolutely recommend this product.