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Getting more capacity out of your factory M&P magazines doesn't have to mean buying all new gear. The Warne Magazine Extension drops right onto your existing mags and gives you real usable rounds without the bulk or fuss. Built from 6061-T6 aluminum and finished with a hardcoat anodized coating, this thing is built to take a beating on the range and in the field.
This extension adds 5 rounds to your 9mm magazines and 4 rounds to .40 S&W magazines. That's a meaningful jump in firepower without making your mag stick out like a sore thumb or feel awkward in your hand. The profile stays low and clean, so your reload is as smooth as the stock setup but with more rounds on tap.
Warne machined this from solid aluminum and applied a Type 2 hardcoat anodize finish, so it'll handle corrosion and hard use without degrading. The extension comes with finger grooves cut right into the body, giving you something to grab when you need to strip a mag from the gun in a hurry. That ergonomic shape also makes insertion smooth and natural, not something you have to force or finesse.
No gunsmithing required. Remove your factory baseplate, slip the extension on, and secure it with the included screw. It works with your existing magazine spring and follower, so you're not messing with any internals or worrying about reliability. The extension preserves your magazine's basic function and geometry, which means feeding is consistent and predictable every time.
Yes, this Warne extension is designed specifically for S&W M&P factory magazines in 9mm and .40 S&W. It works as a drop-in replacement for the factory baseplate, so no modification to your magazines is needed. Just make sure you have the full-size M&P mags (17-round for 9mm or 15-round for .40).
No, the extension installs with just the included Torx head screw. You'll remove your factory baseplate and retaining clip, slide the extension onto the magazine tube, and tighten the screw. The whole process takes a couple minutes and doesn't require any gunsmithing or modification to your magazines.
The Warne extension is machined from solid 6061-T6 aluminum with a hardcoat anodize finish, making it durable for regular use and practical carry scenarios. It works with your existing magazine spring and follower, so feeding and function are predictable. The finger grooves help ensure reliable mag removal if needed.
Yes, the extension works with your existing magazine internals. You just remove the factory baseplate and retaining clip, then install the Warne extension in its place. Your current spring and follower stay in the magazine, so there's nothing else to buy or swap out.
| UPC | 656813108138 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 3311 |
| Brand Fit | S&W |
| Caliber/Gauge | 9mm |
| Capacity | 5 |
| Color | Black |
| Length | 7.5 |
| Model | |
| Model Fit | M&P40 |
| Package Height | 1.0 |
| Package Width | 1.5 |
| Product Type | Accessory-Magazines |
| Shipping Weight | 0.12 |
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