Wt Mag-140-Ss Mag 9Mm 20R Dbl Stk 1911 Ss

The Watchtower Firearms MAG-140-SS is a 20-round stainless steel magazine built for 9mm 1911 platforms. If you run a single-stack 1911 in 9mm and want extended capacity without swapping frames or calibers, this is a straightforward solution: it feeds 9mm rounds reliably and gives you double the rounds of a standard magazine in the same footprint as your gun. Stainless steel construction resists corrosion and handles regular use in the field or at the range.

Double-stack geometry in a 1911 magazine means a wider profile than traditional single-stack mags, so function and fit depend entirely on your specific 1911 platform—some guns accept them without issue, others require feed lips or magazine well tuning. Test-fire before you rely on it for carry or duty. The stainless finish is durable but not immune to wear; keep the witness holes clean so you can verify your round count at a glance.

Whether you're hunting, running courses, or just stocking spares, extended-capacity magazines give you more time on target between reloads. This is a no-frills mag: quality materials, honest engineering, no marketing noise.

Key Features

• 20-round capacity in 9mm for single-stack 1911 platforms
• Stainless steel construction for corrosion resistance and longevity
• Double-stack design for extended capacity
• Witness holes for quick round-count verification

Specifications

Frequently Asked Questions

Will this 20-round mag work in my 1911?

The MAG-140-SS is designed for single-stack 9mm 1911s, but double-stack geometry means it may require fitting or feed-lip tuning in some guns. Function varies by frame and magazine well tolerances. Always test-fire with your specific gun and ammunition before carrying or relying on it for duty.

What caliber does this magazine feed?

This magazine is chambered for 9mm and holds 20 rounds.

Why is stainless steel better than parkerized or blued steel?

Stainless steel naturally resists rust and corrosion, so it requires less maintenance and lasts longer in wet or humid conditions. It's especially useful if you store mags long-term or use them in variable weather.

How do I know how many rounds are loaded?

The magazine includes witness holes along the side so you can count rounds at a glance without unloading.