Rock Island OEMP164015B 1911Blued Detachable 16rd for 40 S&W, 10mm Auto Rock Island 1911 A2

The Rock Island 1911 A2 blued 16-round magazine for .40 S&W and 10mm Auto is purpose-built for shooters who run Rock Island Ultra 1911 pistols in these calibers. If you own one of these hard-hitting platforms—whether for competition, defense, or range work—you need reliable, factory-spec magazines that feed consistently and fit without fuss. This is that magazine.

Built from steel with a polymer base plate, this OEM-spec magazine is manufactured to the same exacting tolerances as Rock Island's original equipment, which means it drops into your gun and works right out of the box. No fitting, no tweaking, no surprises. The 16-round capacity gives you serious ammo capacity in a magazine designed specifically for .40 S&W and 10mm chamberings—not a generic one-size-fits-most design that cuts corners.

Whether you're stocking up for range sessions, building a backup magazine kit, or replacing a worn-out follower, this magazine delivers the fit, function, and durability you'd expect from genuine Rock Island Armory/Armscor hardware. For 1911 shooters who understand that magazines are part of the reliability equation, it's the logical choice.

Key Features

• 16-round capacity for .40 S&W and 10mm Auto
• Steel magazine body for durability and longevity
• Polymer base plate for reliable operation
• Manufactured to OEM Rock Island specifications and tolerances
• Purpose-built for Rock Island Ultra 1911 models
• Factory-spec fit and function—no fitting required

Specifications

Frequently Asked Questions

What Rock Island 1911 models does this magazine fit?

This magazine is designed for Rock Island Ultra 1911 models chambered in .40 S&W or 10mm Auto. It is manufactured to the same specifications and tolerances as the original equipment magazines, ensuring perfect fit and reliable operation in these platforms.

Can I use this .40 S&W/10mm magazine in other 1911 pistols?

This magazine is specifically engineered for Rock Island Ultra 1911 models. While some aftermarket magazines have broad compatibility, we recommend confirming fit with your specific gun before use, as 1911 magazines can vary by manufacturer and model.

What's the difference between this and third-party magazines?

This is a genuine OEM Rock Island Armory magazine built to the manufacturer's exact specifications and tolerances. It uses the same materials and manufacturing processes as the original magazines that ship with the gun, which eliminates guesswork and potential feeding or fit issues.

How many rounds does it hold?

This magazine holds 16 rounds of .40 S&W or 10mm Auto ammunition.