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Chen SI "Shooter Installed" Magwell

MSRP: $184.99
Was: $184.99
Now: $149.99
( saved $35.00 )
271 reviews Write a Review
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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

271 Reviews

  • 4
    SI Shooter Installed Magwell

    Posted by Will Keen on May 3rd 2022

    It was an easy install and looks great!

  • 5
    mag well

    Posted by geo barr on Apr 27th 2022

    worked grate

  • 5

    Posted by Brian on Apr 25th 2022

    Installed on my new Springfield Operator. The fit was perfect. The color match was also perfect. Honestly, I was worried when the description said “blued “so I sent an email asking if it would match, the black matte finish of my operator. The response was very timely. I received the magwell very shortly there after and it did match. Installation was a breeze. I added new flat bottom VZ grips to complete the look. Side note. I have VZ grips on all my 1911s and I agree with Stan, they really do complete the look.

  • 5
    Outstanding 1911 Magwell (2nd purchase)...

    Posted by Gunny M on Apr 19th 2022

    Second time buyer of this outstanding one-piece 1911 magwell. Completely problem-free and an absolute breeze to install as a true drop-in mainspring housing & magazine well for my 1911's. Highly recommended for it's fit, finish, and overall quality. Looks awesome and performs flawlessly. I will be purchasing another for my next 1911 project. Many Thanks!

  • 5
    mag well

    Posted by geo barr on Apr 19th 2022

    great job look good works well

  • 5
    Perfect fit

    Posted by Sam on Apr 15th 2022

    Fit perfectly in my Springfield 1911. Craftsmanship and quality are awesome! Magazines go in with little effort.

  • 5
    Chen SI Magwell

    Posted by Mark O. on Apr 11th 2022

    Very nice, quality stainless steel magwell with large funnel and still compact enough for concealed carry. Installation was easy and required no gunsmithing or fitting.

  • 5
    Si magwell, blued

    Posted by BRENT "BUBBA" TIPTON on Apr 1st 2022

    I've used magwells from several different companies , the higher end models, on a plethera of 1911 builds in the past 20 years. The Si magwell I just installed on a new springfield operator blew them all clear off the map! The fit and finish are exactly what you would expect from a custom shop with Chen's reputation for perfection. Fit and finish were flawless. Snug in the mainspring housing track, sits tight against the bottom of the grip, no play or light shows at all. The "well" is true to description and flows nicely into the pre-flared magazine opening on the operator. The mainspring hole looked honed with no drag whatsoever on the spring and plunger. Checkering was sharp on the backstrap and it looks like Chens shop to a lesson from the great Clark CG and has a very nice melt to exposed edges and a rounded butt. BEST MONEY IVE SPENT ON A MAGWELL.

  • 5
    Outstanding 1911 Magwell...

    Posted by Gunny M on Mar 31st 2022

    I purchased this Stan Chen S.I. Magwell to replace the standard Mainspring Housing in my Springfield Armory 1911 Operator, and I must say that it took me all of 6 minutes to make the trouble-free switch. The fit, finish, and overall install of this magwell is phenomenal, and I cannot recommend it enough for anyone wishing to upgrade their 1911 with the absolute best one-piece MSH & Magwell available. Everything lined up perfectly and it functions without a hitch; truly an outstanding 1911 magwell. Bravo Zulu!

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