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+3 Magazine Extension for Smith and Wesson Sigma and SD 9mm Pistols

+3 Magazine Extension for Smith and Wesson Sigma & SD and SD 2.0 9mm Pistols

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Sigma 9mm and SD and SD 2.0 9mm +3 Magazine Extension

You've asked and now we're answering. Introducing our newest +3 magazine extension for the Sigma and SD pistol series. Take your stock standard capacity 9mm mag and adds 3 rounds to it. Will NOT work with 10 round mags. 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. Reuse your original magazine spring, follower, and spring base plate for an easy install. Get yours today!

Includes a cap head screw and cap on the top front for retention. Remove the retaining screw and cap, slide the mag tube on to the extension while holding the spring pad and mag spring inside the mag tube, then reinstall the cap and snug it up using the cap head screw to the top of the extension body to keep the extension from sliding forward. There is no need to over-tighten the set screw. Use a 3/32nd allen wrench to make the adjustments.

*** Need of a 3/32nd 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 "3/32nd Allen Wrench" to the cart and then click the "Continue shopping" button 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. ***

Fits Smith and Wesson® Sigma 9mm, Sigma VE 9mm, SD-VE 9mm, SD 9mm, and SD 2.0 9mm Factory Magazines.

*** NOT FOR 40 MAGS or 10 ROUND MAGS ***

As always, proudly made right here in the USA.

*** 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). ***

Specifications

Parent SKU
GP-ME-SD
Brand
Galloway Precision
Country of Origin
USA
Assembly
Fletcher NC USA
Item Condition
Brand new in original packaging
Made from
Carbon Fiber Reinforced Nylon

- SKU
  GP-ME-SD
Product class
Galloway Precision Product
Add a 3/32 Allen Wrench
No Allen Wrench, Yes 3/32nd Allen Wrench
Manufacturers
- Manufacturer
  Galloway Precision

Product questions

Vazquez

Dec 9, 2023, 23:03

Will this work for the SD9VE?

Administrator

Dec 11, 2023, 10:31

Yes as long as it is not a 10 round mag or a non factory mag it will yes.
Candyce Allen

Aug 23, 2023, 00:37

How much does it weigh? The length?

Administrator

Aug 23, 2023, 09:03

Same length as the stock base pad. Just taller with a pocket.
Kyren

May 26, 2023, 01:18

How long does this usually take to come

Administrator

May 26, 2023, 10:01

depends where you are, once it ships you get a tracking email and the post office info on movements. Once in their system they are your point of contact for additional info on the package though.
Brayden

May 8, 2023, 21:53

Will the original mag spring work with this mag exstension?

Administrator

May 9, 2023, 11:56

Yes you reuse the stock mag spring. It will not work with limited capacity mags, just the standard cap mags.
brandon hart

Jan 31, 2023, 20:47

Will this work for SW9VE ? S&W

Administrator

Feb 1, 2023, 10:57

Yes the 9mm SW shares a grip well, magazine and will take the extension as well.

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Customer reviews

Average rating:

5.00 (Votes: 11)

Rating of votes (11)

	5			11customers
	4			0customers
	3			0customers
	2			0customers
	1			0customers

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Matt

Feb 5, 2024, 22:58

I bought one of these mag extensions for my SD9 2.0 and I am very happy with it. It re-uses the factory mag spring, and was easy to install. I fired it full, three times and had no issues. The slide locked back on empty. Feels solid and well built. Would recommend.
Ross

Dec 5, 2023, 14:19

I ordered the +3 because it does give a little more grip for the pinky, never hurts to have a few extra rounds, and is still easy to CC. Fast delivery, maybe 3 days. Went to the range today and had no issues. Ran FMJ, Federal HST, and Critical Duty through it with no failures.
Michael

Jun 7, 2023, 04:34

Bought one to “try”. This pistol always seamed small and little to light in my hand like I wasn’t getting a full grip. My pinky would sit even or slightly below the bottom of the magazine. Added this gem to one of my magazines. The extension added enough mass and weight to increase my comfort and confidence in shooting. Knew I found a solution to my issues within the first five rounds sent down range. Will be ordering more to swap out the rest of my spare magazines. Good quality easy to install best price on the market. Fast shipping. What more could anyone ask for. Highly recommended
Christopher C. - MT.

Jan 22, 2023, 11:03

Purchased for a SW9VE, extension slid onto magazine easily and is held in place by a little retaining screw. Added +3 rounds capacity to 16 round magazine. Have 13 magazines total, all but 3 are 16 capacity (PS: take a look inside a 10 round SW9VE magazine, little surprise coiled up in there!). Have some 17 round capacity magazines as well for a total of 20+1, thanks again Galloway, I'll be ordering more magazine extension for certain! : )
Tim T

Dec 16, 2022, 14:40

Just received my spring kit and mag extensions. Everything works awesome! This company has the best products without spending a whole pay check. I’m very please with my SD9 upgrades. I will always buy all my parts from Galloway Precsion all day long…

Read all reviews for the product (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.