Ruger 90343 Finger Extension for SRc 9rd .40 S&W/10rd 9mm Luger Magazines, Black Plastic

The Ruger 90343 finger extension is a simple upgrade for shooters who carry or train with SR9c or SR40c compact pistols. This black plastic extension fits both the 10-round 9mm Luger and 9-round .40 S&W magazines, giving your pinky a proper grip purchase instead of dangling awkwardly below the magazine well. For concealed carry, that extra bit of control matters in a tense moment—and it costs nothing to install. Just slide it onto the base of your magazine tube and you're done.

Compact carry guns demand compromise, and magazines are where you feel it most. Standard compact mags are snappy to reload but unforgiving to grip during live fire or emergency presentations. This extension doesn't make the magazine longer—it just extends the baseplate slightly so your shooting hand sits more naturally on the gun. Whether you're running the SRc as a duty backup, an off-duty EDC piece, or a range trainer, a secure three-finger grip is non-negotiable.

Ruger engineered this as factory direct-fit hardware, so there's no fitment guessing. Black plastic construction keeps weight negligible and won't snag in a holster or pocket. If you own multiple SR9c or SR40c mags, picking up a spare or two makes sense—they're easy to lose and even easier to justify.

Key Features

• Fits Ruger SR9c 10-round 9mm Luger and SR40c 9-round .40 S&W magazines
• Extends baseplate for full three-finger purchase on compact pistols
• Black plastic construction, minimal weight and low-profile design
• Direct-fit Ruger factory component—no modification required
• Simple installation onto magazine tube

Frequently Asked Questions

Which Ruger magazines does this finger extension fit?

The Ruger 90343 is designed for the SR9c 10-round 9mm Luger magazine and the SR40c 9-round .40 S&W magazine. It will not fit other Ruger magazine types or competitors' products.

Will this extension make my magazine stick out of the gun?

No. The finger extension adds a small amount of material to the baseplate to give your pinky a rest point, but it does not extend the magazine's overall height in a way that significantly changes how the loaded magazine sits in the frame.

How do I install the finger extension?

The extension slides onto the base of the magazine tube. It's a simple, tool-free installation that takes seconds.

Can I use this on my SR9 or SR40 full-size magazines?

No. This extension is engineered specifically for the compact SR9c and SR40c magazine dimensions and will not fit full-size SR9 or SR40 magazines.