Sig P239 +1 Mag Extension
You've asked and now we're answering. Introducing our newest +1 magazine extension for the Sig Sauer P239 .357 SIG / .40 S&W or 9MM pistol series. Made from carbon fiber reinforced nylon, this economical mag extension is no slouch in the engineering department, with the material being one and half times stronger than aluminum. Not only does the extension add one round making the pistol and 8+1 now, it also makes a nice space for your pinky to rest for a better grip. Get yours today!
Includes a set screw on the top rear for retention. Tighten the set screw clockwise until flush with the extension shoulder to allow clearance for the mag tube shoulder, install the extension, then turn the set screw counter-clockwise a turn or two to block the mag tube shoulder to keep the extension from sliding forward. Use a .050 allen wrench to make the adjustments.
*** Need of an .050 Allen Wrench? Please select it from the drop-down before adding the Extension to the cart. If you are ordering more than 1 Extension and need only 1 Allen Wrench please add 1 with an ".050 Allen Wrench" to the cart and then close the pop up to return to the listing and select "No Allen Wrench" and add the additional quantity of Mag Extensions needed to the cart. Tools are non-refundable. ***
*** A 20% restocking fee will be applied on returned magazine extensions that have been installed. Non-installed parts will receive a full refund (minus shipping). ***
Fits Sig Sauer P239 .357 SIG and .40 S&W or 9MM Factory Magazines.
*** Please select Caliber from the drop-down menu before adding to cart ***
As always, proudly made right here in the USA.
Check out our new Tier One Carry Service for the Sig Sauer P226, P228, P229, P238, P239, P938, and P320 that allows you to add a micro optic for the ultimate carrier piece. Click here to read more.
Sig P239 +1 Mag Extension for the .357Sig and .40S&W
In this video we go over the installation of our +1 magazine extension for the Sig Sauer P239 chambered in .357Sig and .40S&W.
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Video DurationPT3M02S
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Video Release Date2018-09-27
Specifications
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Parent SKUGP-ME-P239
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BrandGalloway Precision
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Country of OriginUSA
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AssemblyFletcher NC USA
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Item ConditionBrand new in original packaging
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Made fromCarbon Fiber Reinforced Nylon
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Product classGalloway Precision Product
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Add an .050 Allen WrenchNo Allen Wrench, .050 Allen Wrench
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Caliber9mm, .357 SIG and .40 S&W
- Manufacturers
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ManufacturerGalloway Precision
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Product questions
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Feb 1, 2023, 08:39
Is there an extension that would work on a Sig 290 ?
Feb 1, 2023, 10:40Sorry not one we offer or have plans to offer right now due to the pistol be discontinued several years ago.
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Jan 19, 2023, 16:56
P239 9mm da/sa USA 2011 manf. date.
Your +1 mag extension works perfectly with my Hogue g10 checkered & wood grips. I almost didn't try the product because you state that only OEM grips are compatible. Just an FYI.Jan 20, 2023, 10:34That is interesting, thanks for the info.
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Nov 27, 2022, 10:36
Will the mag extension for the Sig P239 (.40) work with Hogue grips, or is it limited to the OEM factory grips?
Nov 28, 2022, 13:24Just the OEM style grips. The Hogue units are lower and will not allow for mag lockup with the extra length.
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May 15, 2022, 05:28
The mag on my p239 40cal says " Made in Italy". Will the extension fit?
May 16, 2022, 09:36Yep should be fine with the made in Italy on the front face lower end of the mag.
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Apr 19, 2022, 13:46
I have 8round mags. Will these work and make them 9+1 ?
Apr 19, 2022, 14:43Yes , not sure why that says 8 plus one it should read 9 plus one. I'll let the admin know to correct that.
Customer reviews
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KyleNov 4, 2020, 12:31Great extension! Got 2 of these for my p239 in 357 sig and they fit great, allow for a better grip on my pistol along with the hogue grip, also lets me have 8 in a mag rather than 7.
*100% money back (less shipping) on all our products is offered by us against failure of our components or just displeasure our products did not meet your expectations or end needs within the first 30 days. Buy and don't like it, we will refund your purchase price minus shipping upon return, within 30 days of purchase of the complete unmodified parts in question, with the exception of Tool Kits, Tools, Installation Kits, and Closeout products which All Sales are Final. A 20% restocking fee will be applied to returned Triggers, Trigger Kits, Optic Mount Plates, and Guide Rods that have been installed and damaged. Non-installed/non-damaged parts will receive a full refund. If you choose to modify any of our parts without instruction from a Galloway Precision tech, the parts are not eligible for refund or replacement. Refunds are issued upon return within 2 business days back to the original credit card used to purchase the product. We may apply signature required to reduce lost orders for totals over 100.00 or replacement parts or apt addresses.
Despite every effort to provide accurate images of each product’s color and design, actual colors and design may vary slightly, due to different device screen settings, the lighting in the installation location, slight differences in product finishes over time and other factors. Galloway Precision will not accept responsibility for any color or design differences that are not factory faults. When purchasing from Galloway Precision, you agree to accept the small risk that there will be a slight variation between the actual color and design, and the representation on our website. In addition, please be aware that colors and textured finishes often vary between batches; for example slightly different shades of ‘Red’, different degrees of shininess, and different looks and feel for ‘metal/Printed products’ material.
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