Weatherby 18I MO Habitat 12 Gauge Shotgun - 28" Barrel, 3" Chamber

The Weatherby 18i MO Habitat 12 gauge shotgun is a semi-automatic built for hunters who demand reliable performance across diverse terrain and conditions. This 28-inch barrel model chambers 3-inch loads, giving you the flexibility to cycle everything from light target rounds to full-power waterfowl and upland loads without sacrifice. Whether you're working a marsh at dawn or pushing through thick cover, the 18i is engineered to keep pace with serious hunters who can't afford a breakdown in the field.

At the heart of the 18i lies a field-proven inertia recoil system that cycles reliably while keeping the gun balanced and pointable. The single-piece aluminum receiver is precision-machined from billet stock for strength without excess weight, and the polymer stock is fully shim-adjustable so you can dial in the perfect fit regardless of your frame or shooting style. The aggressive texture on the grip and foregrip locks your hands in place when things get wet or muddy, while a soft-touch elastomer cheek pad keeps your face comfortable during long shooting sessions. An elastomer recoil pad tames felt recoil, letting you stay on target and keep hunting instead of nursing your shoulder.

The full-length ventilated rib pairs with LPA fiber front sights for fast target acquisition even when light is low—critical during those prime hunting hours at dusk and dawn. The chrome-lined bore resists corrosion from repeated use in wet environments, and the Mossy Oak camo pattern is bonded directly to metal and polymer alike, so it won't peel or fade. The 18i ships with five Crio Plus choke tubes (cylinder through full), a storage case, and a choke wrench. The magazine holds 4+1 with extended capacity, or you can run it 2+1 with the included limiter plug if local regulations require it. The gun is also compatible with aftermarket magazine tube extensions if you need more capacity.

From early season dove to late-season ducks, from clay target practice to upland birds, the Weatherby 18i MO Habitat is a no-compromise workhorse for the hunter who expects reliability when it matters most.

Key Features

• Inertia recoil system for reliable cycling of light and full-power loads
• Single-piece precision-machined aluminum receiver
• Shim-adjustable polymer stock for custom fit
• Elastomer recoil pad reduces felt recoil
• Soft-touch cheek pad with aggressive grip texturing
• Full-length ventilated rib with LPA fiber front sight
• Chrome-lined bore for corrosion resistance
• Mossy Oak camo bonded to metal and polymer components
• Crio Plus choke system with five tubes and wrench
• Compatible with magazine tube extensions

Specifications

Frequently Asked Questions

What choke tubes come with the Weatherby 18i?

The 18i ships with five Crio Plus choke tubes covering the full spectrum: cylinder, improved cylinder, modified, improved modified, and full. You also get a storage case and a choke wrench for easy changes in the field.

Can I use lighter loads in the 3-inch chamber?

Yes. The 3-inch chamber and inertia recoil system are designed to cycle a wide range of loads reliably, including lighter target and small-game ammunition. This flexibility is one of the key advantages of the 18i platform.

Is the stock adjustable for different shooter frames?

Absolutely. The polymer stock is shim-adjustable, allowing you to customize the fit for your particular build, shooting style, and comfort. Combined with the soft elastomer cheek pad, this lets nearly any shooter dial in the perfect sight picture and shoulder contact.

Can I add a magazine extension to the 18i?

Yes. The 18i is compatible with aftermarket magazine tube extensions if you want to increase your ammunition capacity beyond the standard 4+1.