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The Warne magazine extension gives your Smith and Wesson M&P factory magazines exactly what they need: more rounds and better ergonomics. This is a straightforward upgrade that delivers on both counts without any fuss. When you install it, you're replacing the factory baseplate with a machined aluminum extension that adds 5 rounds to your 9mm mag or 4 rounds to your .40 S&W mag.
Machined from 6061 T6 aluminum billet, this extension combines real durability with a clean look. The Type II hard-coat anodized finish in Flat Dark Earth resists scratches and corrosion, so it'll hold up through regular use and holster wear. The design includes ergonomic finger grooves that actually make a difference when you're grabbing a mag for a reload, especially under pressure. Installation is simple with the included Torx screw and washer, and once it's on, it integrates seamlessly with your mag and grip.
The extension performs exactly as it should. It provides reliable feeding and lock-back every time, with no negative impact on how your pistol functions. The low-profile design keeps things looking proportional to your M&P while still giving you meaningful capacity gains. For competitors, tactical shooters, and anyone who just wants more rounds on tap, this is the kind of upgrade that works without requiring any thought about it after installation.
The Warne extension works with any standard M&P 9mm or .40 S&W factory magazine. It's designed to be compatible with aftermarket base pads and other M&P magazine accessories, so if you want to layer on additional customization down the road, you have options.
No, this extension is specifically designed for the full-size M&P 9mm and M&P .40 S&W. It will not fit M&P Shield models. Make sure you have the full-size factory M&P magazine before ordering.
The Warne extension uses your factory magazine's existing spring and follower, so no replacements are needed. It simply replaces the baseplate, making installation straightforward and keeping costs down.
Installation takes just a few minutes. You remove the factory baseplate from your magazine, slide on the Warne extension, and secure it with the included Torx screw. A standard Torx wrench is all you need to complete the job.
Yes. The Type II hard-coat anodized finish is specifically applied to resist scratches and corrosion. It holds up well to regular use, holster wear, and magazine exchanges at the range or in the field.
| UPC | 656813108152 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 3313 |
| Product Type | Accessory-Magazines |
| Shipping Weight | 0.12 |
| Package Height | 1.1 |
| Package Width | 1.8 |
| Length | 7.5 |
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