ETS 21rd 9MM Sig P320 Magazine – Smoke

SKU: SMK-SG9-320-21

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Stern Defense Magazine Conversion Block - for M&P, P320/P250, 9mm, & .40 S&W Magazines

Stern Defense Magazine Conversion Block – for M&P, P320/P250, 9mm, & .40 S&W Magazines


Elite Tactical Systems 21rd Sig P320 Magazine

Extended capacity while being easy to carry, the ETS 21rd Smoke Magazine is a reliable cost-efficient option to OEM magazines. Its transparent design allows the shooter to  keep track of remaining rounds and also see which types of rounds in the magazine. This magazine is compatible with all Sig P320 9MM models including the Legion, X-Series, and M17/18 series.

The magazine’s specially designed base plates make them easy to grab and disassemble without any tools. Additionally, the magazine also offers superior temperature tolerances so it won’t become brittle over time, even when exposed to harsh environments, chemicals, or extreme cold.

ETS 17rd 9MM Sig P320 Magazine - Smoke

Advanced Polymer Construction

The ETS 21-Rounds translucent smoke magazine is made from advanced polymers that provide extreme impact resistance so it won’t easily crack or break even when dropped. Its durable construction eliminates creep so the feed lips and body won’t spread when being stored long term, even when fully loaded.

ETS polymer magazines are reliable and affordable magazines, making them a top-notch alternative to OEM magazines. All ETS polymer magazines come with ETS lifetime warranty.


  • Fits the Sig Sauer 9mm P320
  • Extended 21-round capacity
  • Base plates interchangeable with ETS line of 9mm double stack magazines
  • Easy disassembly with their specially designed base plate
  • Ergonomically designed floorplate makes it easy to grab from mag pouches
  • Lifetime Warranty

Advanced Polymer Benefits

  • Extreme Impact Resistance so they won’t easily crack or break when dropped
  • Very resistant to harsh chemicals
  • Superior heat, cold, and UV resistance — won’t become brittle over time even when exposed to harsh environments or extreme cold
  • Translucent body — allowing you to see your ammo count and type
  • Feed lips and body won’t spread when kept fully loaded


  • Brand: Elite Tactical Systems
  • Caliber: 9mm
  • Capacity: 21 Rounds
  • Fit: Sig Sauer P320
  • Material: Advanced Polymer
  • Color: Translucent Smoke Finish
  • Weight: 0.12 LB

Have Questions About this Product?

The AT3 Tactical store has a 90 day no-hassle return policy for products in good condition. You can view the full details of our return policy here.

If you encounter an issue or defect with a product after 90 days of your purchase, you can refer to the manufacturer for a warranty claim. Their policies are below.

ETS Lifetime Guarantee

The ETS AR-15 Mag System is made tough and made in the USA with a Lifetime Guarantee.

If in case, you have any issues with ETS Products, their customer service team is available to help you with all your inquiries, product information, and support. Please contact them directly at the following details.

Contact Details:

  • Telephone: 855-887-5452
  • Email:

Disclaimer: Manufacturer’s warranty is subject to change without prior notice.