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

Henning Group's SIG SAUER P320 Magazine Extension kit - Plus 6 in 9mm / 40 S&W
Item: H-KM07    Manufacturer: Henning
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$59.90
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Henning Group's Sig P320 Magazine Extension Kit is perfect for extending your Sig Sauer P320 magazine with 6 more rounds; whether it is 9mm or 40 S&W. It will work on 17 round 9mm, 21 round 9mm, 14 round 40S&W or 18 round 40S&W magazines! They were designed to fit the USPSA gauge for Limited and Carry Optics divisions. Attached to the factory 17 round magazines they extend the overall length to 141.25mm (5.56"). 

So if you are looking for an extension for competition, every day carry or law enforcement, these extensions are super easy to install. The kit comes with a Grams follower kit that replaces the factory follower, spring and locking plate.

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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