Magazine Extension KIT for Sig Sauer P320 9mm / 40S&W

Henning SIG SAUER P320 9mm / 40 S&W PLUS 6 USPSA Magazine Extension with Follower Kit
Item: H-KM07    Manufacturer: Henning
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Magazine Length

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$59.90
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Our extended base pads are legal for USPSA Limited, Open and Carry Optics divisions. Attached to the factory magazines they extend the overall length to 141.25mm (5.56"). Whether you want to be competitive or not, these pads will increase the capacity of your Sig Sauer P320 standard length magazines. 

Our extensions will also work for the long magazines if the tube does not have a cutout on the back. That means the 9mm 21 round magazines becomes a 27 round magazine and the 40 S&W 18 round magazine becomes a 24 round magazine. See picture regarding the cut-out we're talking about. Also, make sure to note in comment when you order that you want it for the long mag, we will ship a 13 coil follower spring kit instead of the regular 11 coil.

For 9 mm you will increase from 17 rounds to 23 rounds on a standard length magazine, and from 21 to 27 on an extended length magazine.


For 40 S&W you will increase from 14 rounds to 20 rounds on a standard length magazine, and from 14 to 20 on an extended length magazine.


  • Manufacturer: Henning
  • Shipping Weight: 0 lbs
Average Rating   5 stars (based on 1 review)
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Recent Reviews Rating: Reviewed By: Shawn B. Review Date: 1/14/2020 Comments: These mag extensions are amazing. I carry a p320 for work, and I recently converted mine to a 357 Sig, which has a standard 14 round magazine. There are 18 round magazines made by Sig, but good luck getting your hands on one. This kit turns your 14 round ...
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