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Promag

ProMag AR-15/M16 Magazine 5.56 NATO/.223 Rem. 42 Rounds Polymer

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

Fits Ar-15

M16 rifles chambered in 5.56x45mm

42-round Capacity

For extended shooting sessions

Dupont Zytel

Polymer construction

Heat-treated Chrome-silicon

Springs

Replacement Magazine

From ProMag

$12.99
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SKU: WX2*0706258

Overview

Built for AR-15 and M16 rifles chambered in 5.56x45mm NATO or .223 Remington, this replacement magazine is intended for shooters who want a straightforward 42-round option for range use or general rifle setup. Its DuPont Zytel polymer construction gives it a durable, lightweight profile without adding unnecessary complexity. Heat-treated chrome-silicon springs are included as part of the magazine’s design, supporting consistent feeding in a compatible platform. For hunters and outdoor shooters who keep an AR-pattern rifle in their kit, it offers a practical high-capacity magazine choice with a simple, purpose-driven design.

Why Hunters Choose the Promag

Fits Ar-15

M16 rifles chambered in 5.56x45mm

42-round Capacity

Reduces the need for frequent

Dupont Zytel

Polymer construction offers a durable

Heat-treated Chrome-silicon

Springs are included in the

Replacement Magazine

Format for straightforward compatibility with

Key Features

  • Fits AR-15 and M16 rifles chambered in 5.56x45mm NATO/.223 Remington.
  • 42-round capacity for extended shooting sessions.
  • DuPont Zytel polymer construction.
  • Heat-treated chrome-silicon springs.
  • Replacement magazine from ProMag.

Best Used For

  • AR-15 or M16 owners needing a 42-round replacement magazine for 5.56x45mm NATO/.223 Remington
  • Shooters wanting a polymer magazine with heat-treated chrome-silicon springs
  • Users looking for a magazine intended for AR-15/M16 fit and feeding function
  • Range shooters who prefer a higher-capacity magazine for extended shooting sessions

Specifications

Caliber5.56x45mm NATO/.223 Remington
Capacity42 rounds
Firearm CompatibilityAR-15 and M16 rifles
MaterialDuPont Zytel polymer
Spring MaterialHeat-treated chrome-silicon springs

Pros

  • Fits AR-15 and M16 rifles chambered in 5.56x45mm NATO/.223 Remington.
  • 42-round capacity reduces the need for frequent reloads at the range.
  • DuPont Zytel polymer construction offers a durable magazine body.
  • Heat-treated chrome-silicon springs are included in the design.
  • Replacement magazine format for straightforward compatibility with listed rifles.

Considerations & Trade-offs

  • 42-round capacity may be more than you want for range sessions or field use where a smaller magazine is preferred for handling and storage.
  • This is a replacement magazine for AR-15/M16 rifles chambered in 5.56x45mm NATO/.223 Remington, so compatibility is limited to that platform and cartridge family.
  • Polymer construction keeps the design lightweight, but it may not suit buyers who specifically want a metal magazine body.
  • The product description does not provide detailed fitment or performance data beyond the stated design, so confirming compatibility with your rifle setup is important.

Suggested Comparisons

  • Standard-capacity AR-15/M16 magazines
  • Higher-capacity AR-15/M16 magazines
  • Polymer rifle magazines
  • 5.56 NATO/.223 Remington magazines

Suggested Accessories

  • Magazine loader
  • Magazine pouch
  • Cleaning kit
  • Ammo storage box

Frequently Asked Questions

What rifles is this magazine made to fit?

It is designed for AR-15 and M16 rifles.

What cartridges does it support?

The product data lists 5.56x45mm NATO and .223 Remington.

How many rounds does it hold?

It has a 42-round capacity.

What is the magazine body made from?

The source data lists DuPont Zytel polymer construction.

Does the product data mention any spring material?

Yes. The short description states it uses heat-treated chrome-silicon springs.