A Nordic Components MXT +3B magazine extension tube kit that adds three rounds to a 12-gauge shotgun's tube magazine. The distributor lists the MXT kits as a universal fit for 12-gauge tube-fed shotguns; confirm your model before ordering. Extra capacity is a common upgrade for home defense and 3-gun shotguns, cutting down on reloads.
- Brand: Nordic Components
- Type: Magazine extension tube kit
- Gauge: 12
- Added capacity: +3 (model +3B)
- Fit: Listed as universal 12 gauge
