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The MXT +9 brings serious magazine capacity to compatible 12 gauge shotguns. Whether you're setting up for 3-gun competition, extended hunting sessions, or just want more rounds on tap at the range, this extension delivers the capacity boost without the bulk. The kit ships with everything you need except the nut: the aluminum extension tube, a full-length magazine spring, and an end cap.
Nordic Components machined this tube from 6061 aluminum and anodized it for a matte black finish that won't show handling marks. The real engineering work shows in the details. The relief groove that runs along the tube eliminates barrel clamp travel and keeps your extension from rotating after you install it. The tube is also reversible, meaning you can flip it to position a barrel clamp wherever it works best for your shotgun's profile. Thread pitch on both ends makes this actually possible without special tools.
The +9 capacity rating is based on standard 2.75 inch star-crimped shells. If you're running 3 inch shells, plan on fitting about 8 in the tube. The 3.5 inch magnums drop it to 7. Your shotgun's spring comes with the kit and is already the right length, but for larger capacities you'll likely want to trim it during install to match your gun's magazine volume. The kit won't attach without a shotgun-specific MXT extension nut, which is sold separately and depends on your exact shotgun model. Works with Remington, Benelli, Mossberg, Stoeger, Browning, Winchester, and other popular 12 gauges when paired with the correct nut.
This extension tolerates high round counts and doesn't flinch during hard use. The spring holds up better than factory parts, and the tube won't degrade in demanding environments. Most installations take less than an hour with basic hand tools and a willingness to follow instructions. Some shotguns have factory dimples in the magazine that need smoothing out, and any spring retention plugs have to be removed, but that's not unusual for this class of product.
Yes, you need a shotgun-specific MXT extension nut (sold separately) that matches your gun's brand and model. The nut replaces your factory magazine cap and connects the tube to your receiver. Without it, the extension won't mount. Nordic makes nuts for Benelli, Remington, Mossberg, Stoeger, Browning, Winchester, and others.
It depends on your specific model. The MXT tube itself is universal for all 12 gauge shotguns, but compatibility comes down to whether Nordic makes an extension nut for your gun. The tube is designed to work with most pump and semi-auto models from major manufacturers. Nordic's website has a fit guide showing which guns are supported.
Yes, and for higher capacities you'll probably have to. The kit includes a full-length spring as a starting point. Most installations require trimming the spring to fit your magazine tube volume. Nordic recommends starting with 14-16 inches of spring extending past the tube end for semi-autos and 8-12 inches for pump actions, then adjusting if needed. Test with dummy rounds first.
The +9 capacity is guaranteed only for 2.75 inch shells. With 3 inch shells, you'll fit about 8 rounds. Three and a half inch magnums will hold roughly 7. Choose a larger extension size if you want to maintain capacity with longer shells, or stick with standard ammo.
| UPC | 816696021539 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | MXT-TBS-12-9 |
| Caliber/Gauge | 12 Gauge |
| Capacity | 9-Round |
| Color | Black |
| Model | |
| Product Type | Magazine Extension |
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