Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Special offer available for this product. Click here to see!
Government Export Restriction Government Export Restriction
Questions & Answers
This piece is for sig p-250? Manufacturer Answer

No, this magwell is designed for the small, medium, and large XCARRY grip module only, and will not work on the P250.

by Killer Innovations, Manufacturer, August 6, 2025
why doesn't this fit the full size x series grip module? Manufacturer Answer

Our Sig P320 magwells were designed for the small, medium, and large XCarry grip modules. This will work on the Full-Size X Series Grip Module as well as the X5 TXG.

by KillerInnovations, Manufacturer, November 20, 2024
Customer Reviews
Helpful Positive Review
Sig 320 Magwell FDE by billyblue, Verified Owner, May 9, 2025
The item looks great, was easy to install with no tools. The FDE color is slightly metalic but i dont mind. I put it on a coyote colored sig 320 xcarry. The down side I didnt know it doesn't allow 17 rnd magazines to load in the magazine well. They a...
Read More...
1/1 found this helpful
Helpful Positive Review
works Perfect by Wolf, Verified Owner, February 28, 2024
Works well perfect fit for my p320 xfull, looks great feels great. Only thing I can say it doesn’t come with the Allen key needed to tighten the screw please make sure you have one with you.
1/1 found this helpful
Helpful Negative Review
Doesn’t fit as advertised by Olaf, May 29, 2022
I bought this for my P320 compact because in the questions they said it would fit, it did not which I had a feeling it wouldn’t. So I really liked it so I ordered an X carry grip module since that’s the exact advertised figment. Got the module in, an...
Read More...
1/6 found this helpful
Most Recent Reviews
P320 magwell by Sig mods, Verified Owner, March 27, 2026
Nice quality looks amazing fit well minor modifications vary happy with it
Most Recent Reviews
Poorly fits & returned by Sig-320 customer, Verified Owner, October 9, 2025
Before purchasing, let me start by saying... I own a few and love extended mag-wells. I wanted something to match my two tone 320 V-Tac and the label states the product color is FDE... It's NOT! I gave 2 stars because this item was clearly made of ...
Read More...
Most Recent Reviews
Grey is silver by DAMOND, Verified Owner, August 18, 2025
The grey is silver. Not even close to the picture. If you're hoping it would be muted and match the dark grey Legion frame, nope! It's silver. Just get black. The fit and finish and compact design is awesome and still funnels in the magazine like any...
Read More...
Read All 15 Reviews
Show In Stock Only
7 Models Available
Color
All
Search

made-in-usa-flag Made in USA

Help support American manufacturing! Marked models of this product have gone through rigorous review and been certified by the manufacturer as Made in the USA.

Product Info for Killer Innovations Sig P320X Magwell

Upgrade your pistol with a Killer Innovations Sig P320X Magwell to guide your magazine for faster reloads while gaining more control of your weapon for self-defense or training scenarios. Killer Innovations machined these Magwells from aircraft-grade aluminum for a lightweight yet durable structure that is tough enough to handle your most intense missions. This Killer Innovations Velocity Magwell for Sig Sauer P320X is an ideal addition to any build since it is both concealed and balanced so it won't interfere with how you hold your weapon or interfere with other people's magazine flares. However, please note that these magwells are only compatible with their proprietary grip modules and magazine extensions, and they will not work with factory basepads or magazine extensions. Ensure you remove any existing magazine wells before installing the Killer Innovations Velocity Magwell for Sig P320X. Also, don't force magazine issues on your own since it is a risk when you force others to modify your gun in any way.image

Specifications for Killer Innovations Sig P320X Magwell:

Manufacturer: Killer Innovations
Fabric/Material: Anodized Aircraft Grade Aluminum Body
Gun Make: SIG Sauer
Gun Model: SIG Sauer P320
Condition: New
Country of Origin: USA

Features of Killer Innovations Sig P320X Magwell

  • Compatible with: small, medium and large XCARRY Grip Modules
  • Can Only Be Used With Killer Innovations Base Pads and Magazine Extensions, will not work with Factory Basepads

Package Contents:

  • Killer Innovations Sig P320X Magwell
  • 1 SCREW

Killer Innovations Sig P320X Magwell Orderable Models

List of Orderable Models

  • Killer Innovations Sig P320X Magwell, Black, SIGMW307BLK , MPN: SIGMW307BLK , UPC: 810104452076 , Code: 3P4-MGW-KILI24-SIGMW307BLK
  • Killer Innovations Sig P320X Magwell, Fde, SIGMW307FDE , MPN: SIGMW307FDE , UPC: 810104452090 , Code: 3P4-MGW-KILI24-SIGMW307FDE
  • Killer Innovations Sig P320X Magwell, Gray, SIGMW307GRY , MPN: SIGMW307GRY , UPC: 810104452113 , Code: 3P4-MGW-KILI24-SIGMW307GRY
  • Killer Innovations Sig P320X Magwell, Gold, SIGMW307GLD , MPN: SIGMW307GLD , UPC: 810104452106 , Code: 3P4-MGW-KILI24-SIGMW307GLD
  • Killer Innovations Sig P320X Magwell, Red, SIGMW307RED , MPN: SIGMW307RED , UPC: 810104452137 , Code: 3P4-MGW-KILI24-SIGMW307RED
  • Killer Innovations Sig P320X Magwell, Blue, SIGMW307BLU , MPN: SIGMW307BLU , UPC: 810104452083 , Code: 3P4-MGW-KILI24-SIGMW307BLU
  • Killer Innovations Sig P320X Magwell, Orange, SIGMW307ONG , MPN: SIGMW307ONG , UPC: 810104452120 , Code: 3P4-MGW-KILI24-SIGMW307ONG

Killer Innovations Sig P320X Magwell Unavailable & Discontinued Models

List of Unorderable Models

  • Open Box, Dealer Demo, Killer Innovations Sig P320X Magwell, Red, SIGMW307RED , MPN: SIGMW307RED-DMO , Code: 3P4-MGW-KILI24-SIGMW307RED-DMO-OB-A
  • USED Killer Innovations Sig P320X Magwell, Blue, SIGMW307BLU, EDEMO1, Used, Condition Like New, Inspect and Rebox , MPN: SIGMW307BLU-EDEMO1 , Code: 3P4-MGW-KILI24-SIGMW307BLU-EDEMO-RE-A
Compare (0)
Last updated 2026-06-23 UTC.