Adamson G-12 12Ga Syn 18.5 Mag Fed Semi Sg
The Adamson G-12 is a semi-automatic 12-gauge shotgun built for hunters and sport shooters who need a compact, manageable platform without sacrificing firepower. With an 18.5-inch barrel and a 5+1 magazine capacity, this synthetic-stocked semi-auto delivers the speed of follow-up shots that matter in the field—whether you're working waterfowl, upland game, or running tactical drills at the range. The synthetic furniture keeps things lightweight and weather-resistant, and the pistol-grip stock gives you control and maneuverability in tight spaces or from unconventional shooting positions.
Semi-automatic shotguns reward shooters who understand their advantages: less recoil impulse between rounds (the gun does some of the work), faster target reacquisition, and the flexibility to adjust your load without changing your technique. The Adamson G-12's fixed choke keeps things simple and reliable—no choke tube swaps to fiddle with in the field. The addition of Picatinny rail real estate means you can mount optics, lights, or other accessories if your mission calls for it, and the ghost-ring front sight gives you a clean sight picture out of the box.
This is a no-nonsense shotgun for shooters who value dependability and straightforward operation. The rubber butt plate absorbs recoil energy, and the magazine-fed design means you're loading from familiar detachable mags rather than wrestling with a tube. Build your loadout the way you want it, and keep moving.
Key Features
- Semi-automatic 12-gauge with 3-inch chamber for standard and magnum loads
- Compact 18.5-inch barrel ideal for close-to-mid-range work
- 5+1 magazine capacity with detachable magazine feed
- Synthetic stock and furniture for durability and weather resistance
- Pistol-grip configuration for control and maneuverability
- Picatinny rail for mounting optics and accessories
- Ghost-ring front sight for rapid target acquisition
- Fixed choke for reliability and simplicity
- Rubber butt plate for recoil management
Specifications
| Gauge | 12 |
| Barrel Length | 18.5 inches |
| Action Type | Semi-Automatic |
| Magazine Feed | Yes (Detachable) |
| Magazine Capacity | 5+1 |
| Chamber | 3 inches |
| Choke | Fixed |
| Stock Type | Pistol Grip (Synthetic) |
| Receiver | Standard |
| Front Sight | Ghost Ring |
| Picatinny Rail | Yes |
| Butt Plate | Rubber |
Frequently Asked Questions
Can I use both 2.75-inch and 3-inch shells in the Adamson G-12?
Yes. The 3-inch chamber accommodates both standard 2.75-inch and 3-inch magnum loads, giving you flexibility to choose the right ammunition for your hunt or range session.
What kind of accessories can I mount on the Picatinny rail?
The rail is designed for standard-mount optics, red dots, lights, and other Picatinny-compatible gear. Check your accessory's mounting specifications to confirm compatibility.
Does it come with the ghost-ring sight installed and ready to shoot?
Yes. The ghost-ring front sight is factory-installed, so you're ready to shoot right out of the box.
Is the magazine included, or do I need to buy it separately?
The facts provided do not specify whether magazines are included. Contact Bosque Outdoors directly for details on what ships with the gun.

