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Questions & Answers
Will this work with the 40 S&W magazines? Manufacturer Answer

This is only compatible with the 9mm models.

by Strike Industries, Manufacturer, March 5, 2025
Will this make a 15 rd mag fit a full sized grip?

No it will not have the clearance to be used in a full size or Carry frame.

by Johnkevin223, Verified Owner, February 11, 2025
Customer Reviews
Helpful Positive Review
Interesting design optional pocket clip. by jt.lowercase, Verified Owner, April 18, 2024
I couldn't seem to get 5 in more than one of the mags but this may take some break in to function fully so 4/5 review.
1/1 found this helpful
Most Recent Reviews
Great but NOT a +5 by Brian Cruz, Verified Owner, April 4, 2026
Looks amazing. Love this on my p320 compact. Could not fit an additional 5 but did fit +3 on my 15 round mag. Looks great
Most Recent Reviews
strike mag extension 4 Sig 320 review by DRSR, Verified Owner, January 3, 2026
Package arrived in estimated delivery time, unblemished and in new condition. The mag extensions like most strike products are awesome . The look and fde finish are nice, but the thing I like the most them is the unique mounting/locking system. The...
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Most Recent Reviews
Great design by Smoke, December 2, 2025
Well made. Quality is real nice. Would buy more if the price was lower. Would like more color options.
Most Recent Reviews
Strike Industries Baseplates are Brilliant! by Russ, Verified Owner, October 14, 2025
I've always been a big fan of strike industries I've bought several products for ARS and pistols so when I saw this product it was a no Brainer. The product were shipped to me quickly thru OP and once received I I stantly knew I was satisfied basepla...
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Most Recent Reviews
Nicely Made by James Botschon, Verified Owner, September 24, 2025
I've always been impressed with Strike Industries products. They're usually very well made, reliable, and have that wow factor. The other thing I really liked about this mag extension is it's very easy to install compared to other extensions I've use...
Read More...
Read All 15 Reviews
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Product Info for Strike Industries SIG Sauer P320 9mm 5 Round Extended Magazine Plate

The Strike Industries Aluminum Extended Magazine Plate for SIG SAUER P320 (9mm) is masterfully crafted to seamlessly fit 21, 17, and 15-round SIG SAUER P320 magazines. Offering an additional plus 5 rounds for 9mm, it's machined from sturdy 6061-T6 aluminum to ensure a durable construction that can handle the rigors of consistent use.image

You'll find it simple and intuitive to install, thanks to its adaptable secure design fitment. At 1.97oz, the Strike P320 EMP boasts a slim, low drag, no snag design that not only enhances its aesthetics but also optimizes its performance. Its dimensions also comply with USPSA rules making it an excellent choice for competitive shooting.

Plus, you can express your style with the available anodized SI BLACKLINE or FDELINE colors. Elevate your shooting experience with this reliable and well-engineered Strike Industries Aluminum Extended Magazine Plate for SIG SAUER P320 (9mm).

WARNING: California`s Proposition 65

Specifications for Strike Industries SIG Sauer P320 9mm 5 Round Extended Magazine Plate:

Manufacturer: Strike Industries
Magazine Capacity: 5 Round
Caliber: 9mm Luger
Gun Make: SIG Sauer
Gun Model: SIG Sauer P320

Features of Strike Industries SIG Sauer P320, 9mm, 5-Round Extended Magazine Plate

  • Fits 21, 17 and 15 round SIG SAUER P320 magazines
  • Machined from 6061T6 aluminum
  • Plus 5 round capacity for 9mm
  • Simple intuitive installation process
  • Adaptable secure design fitment
  • Slimmest profile on the market (low drag / no snag design)
  • Fits USPSA Carry Optics/Limited/Open Divisions
  • Available in anodized SI BLACKLINE or FDELINE colors

Package Contents:

  • Strike Industries SIG Sauer P320, 9mm, 5-Round Extended Magazine Plate
  • x1 Aluminum Extended Magazine Plate for SIG SAUER P320 (9mm)
  • x1 Extended length spring for 21round magazine body
  • x2 Set screw (M4x3mm)
  • x1 Hex tool 2mm
  • x1 Warning card

Strike Industries SIG Sauer P320 9mm 5 Round Extended Magazine Plate Orderable Models

List of Orderable Models

  • Strike Industries SIG Sauer P320 9mm 5 Round Extended Magazine Plate, Black, 0, SI-EMP-AL-P320-BK-5RD , MPN: SI-EMP-AL-P320-BK-5RD , UPC: 793811766578 , Code: 3Q-PME-SISSP1-SI-EMP-AL-P320-BK-5RD
  • Strike Industries SIG Sauer P320 9mm 5 Round Extended Magazine Plate, FDE, 0, SI-EMP-AL-P320-FDE-5RD , MPN: SI-EMP-AL-P320-FDE-5RD , UPC: 793811766585 , Code: 3Q-PME-SISSP1-SI-EMP-AL-P320-FDE-5RD
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Last updated 2026-06-24 UTC.