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Promag

ProMag Smith & Wesson M&P9 Extended Magazine 9mm 20 Rounds

Our editorial team reviews specifications, product data, and field-use information to keep pages accurate.

Fits Smith

& Wesson M&P9 handguns chambered

20-round Capacity

For added ammunition storage

Heat-treated Blued

Steel body

Polymer Follower

Baseplate

Heat-treated Chrome

Silicone wire spring

$24.99
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SKU: WX2*0741264

Overview

Designed for Smith & Wesson M&P9 handguns chambered in 9mm, this extended magazine adds 20-round capacity for shooters who want more rounds on hand at the range or during training. It features a heat-treated blued steel body, polymer follower and baseplate, and a heat-treated chrome silicone wire spring. The magazine is a straightforward fit for compatible M&P9 pistols and is positioned as an affordable option for users who want added capacity without unnecessary extras.

Why Hunters Choose the Promag

20-round Capacity

Extra ammunition for compatible M&P9

Fits Smith

& Wesson M&P9 handguns chambered

Heat-treated Blued

Steel body is listed in

Polymer Follower

Baseplate are included in the

Heat-treated Chrome

Silicone wire spring is specified

Key Features

  • Fits Smith & Wesson M&P9 handguns chambered in 9mm.
  • Provides 20-round capacity for added ammunition storage.
  • Heat-treated blued steel body.
  • Polymer follower and baseplate.
  • Heat-treated chrome silicone wire spring.
  • Made in USA.

Best Used For

  • M&P9 owners wanting a 20-round magazine for range sessions or training drills
  • Shooters needing extra capacity in a compatible Smith & Wesson M&P9 9mm handgun
  • Users looking for a magazine with a heat-treated blued steel body and polymer baseplate
  • Hunters or outdoorsmen who want a spare magazine for a compatible 9mm sidearm

Specifications

Baseplate MaterialPolymer
Body MaterialHeat-treated blued steel
Caliber9mm
Capacity20 rounds
Compatible FirearmSmith & Wesson M&P9 handguns chambered in 9mm
Country Of OriginUSA
Follower MaterialPolymer
Spring MaterialHeat-treated chrome silicone wire

Pros

  • 20-round capacity provides extra ammunition for compatible M&P9 handguns.
  • Fits Smith & Wesson M&P9 handguns chambered in 9mm.
  • Heat-treated blued steel body is listed in the product specifications.
  • Polymer follower and baseplate are included in the magazine design.
  • Heat-treated chrome silicone wire spring is specified in the product details.
  • Made in USA, according to the provided product information.

Considerations & Trade-offs

  • Designed specifically for Smith & Wesson M&P9 handguns chambered in 9mm, so it is not a universal magazine option.
  • The 20-round capacity adds length and bulk compared with standard-capacity magazines, which may affect carry comfort and concealment.
  • It uses a blued steel body with polymer follower and baseplate, so buyers should be comfortable with those material choices rather than an all-metal construction.
  • As an extended-capacity magazine, it may be subject to local capacity restrictions depending on where it is used.

Suggested Comparisons

  • Standard-capacity handgun magazines
  • Other extended-capacity magazines for 9mm pistols
  • Factory magazines for Smith & Wesson M&P9 handguns
  • Magazine pouches or carriers

Suggested Accessories

  • Magazine loader
  • Magazine pouch
  • Range bag
  • Cleaning kit

Frequently Asked Questions

What handguns does this magazine fit?

It fits Smith & Wesson M&P9 handguns chambered in 9mm.

How many rounds does it hold?

It has a 20-round capacity.

What materials are listed for the magazine body and components?

The source lists a heat-treated blued steel body, a polymer follower and baseplate, and a heat-treated chrome silicone wire spring.

Is this magazine made in the USA?

Yes, the source states that it is made in the USA.

Is this an extended magazine?

Yes. The product title identifies it as an extended magazine.