ProMag builds this magazine (part no. COLA4) for the AR-15 platform chambered in .223 Remington/5.56x45mm, holding a 20-round capacity in a heat-treated steel body finished in blued steel rather than the more common polymer. It uses an injection-molded follower and a spring formed from chrome-silicon wire, and at roughly 0.4 pounds it offers the ruggedness of a metal magazine body for shooters who prefer it over polymer. For ProMag owners of an AR-15, this AR-15 magazine is a durable metal-body option.

Key Specifications

• Chambered in .223 Remington/5.56x45mm.
• Holds 20 rounds.
• Fits the AR-15 platform.
• Built from heat-treated steel finished in blued steel.
• Spring formed from chrome-silicon wire.
• Follower is injection molded.
• Weighs approximately 0.4 pounds.
• A detachable box magazine.

Frequently Asked Questions

Why choose a steel magazine over polymer? A steel body offers a different durability profile that some shooters prefer over polymer construction.

How many rounds does it hold? 20 rounds.

Buy the ProMag AR-15 20-Round Steel Magazine

A blued-steel body with a chrome-silicon spring gives this ProMag magazine a rugged alternative to polymer AR-15 mags. Order it from our Lubbock, Texas gun shop for fast, insured shipping.