Description
The Gforce Arms GFBP12NS GFBP 12 Gauge Semi-Auto 3″ 5+1 18.50″ Black Black Picatinny Rail Aluminum Receiver, Black Bullpup w/Pistol Grip, Aluminum Stock, Black Rubber Grip is a short, handy shotgun built for home defense and tactical use. At just 29.5 inches overall, this bullpup design keeps the action and magazine behind the trigger, letting you wield a full-length 18.5-inch barrel in a compact package. It feeds both 2 3/4” and 3” 12-gauge shells, includes a 5-round MKA-1919-compatible magazine, and features flip-up sights plus top and bottom Picatinny rails for mounting optics and accessories. According to Gforce Arms specs, the aluminum receiver and aluminum stock keep weight manageable while ensuring durability.
| Manufacturer | Gforce Arms |
|---|---|
| Model | GFBP12NS GFBP |
| Material | Aluminum receiver, aluminum stock, black rubber grip |
| Compatibility | 12 Gauge 2 3/4” and 3” shells; MKA-1919 magazines |
| Finish | Black |
| Weight | Approx. 6.5 lbs (per manufacturer specs) |
| Condition | New |
Key Features
- Bullpup Configuration – Why it matters: Lets you run an 18.5-inch barrel in a gun that measures just 29.5 inches overall, making it easier to maneuver through doorways and tight corners without sacrificing velocity or pattern density.
- Top and Bottom Picatinny Rails – Why it matters: Gives you a solid platform to mount a red dot, flashlight, or laser without needing aftermarket adapters, keeping your setup clean and ready for low-light or nightstand use.
- Flip-Up Sights – Why it matters: Provides a reliable, no-battery iron sight option that folds flat when not in use, so you’re never caught without a sighting system even if your optic fails.
- QD Sling Mount – Why it matters: Lets you attach a quick-detach sling for hands-free carry during training or property patrol, and the mount is already in place so you don’t have to buy extra hardware.
- MKA-1919 Magazine Compatibility – Why it matters: Uses affordable, widely available magazines that are easy to load and swap, giving you a 5+1 capacity that can be extended with aftermarket options.
Who It’s For
This shotgun is for the southern shooter who values a compact, easy-to-handle firearm for home defense or tactical use. Whether you’re a dove hunter looking for a truck gun or a homeowner wanting something shorter than a traditional long gun, the bullpup design keeps the weight close to your body and the length manageable. It also suits shooters who like to customize their rig with optics and lights, thanks to the built-in rails.
Pros & Cons
- Pro: Very short overall length (29.5”) makes it ideal for tight spaces.
- Pro: Aluminum receiver and stock keep weight reasonable at about 6.5 lbs.
- Pro: Dual Picatinny rails give plenty of room for accessories.
- Con: The bullpup trigger pull can feel heavier and less crisp than a traditional shotgun’s, which may take some getting used to for precision shooting.
Comparison: Gforce Arms GFBP vs. Competitors
| Feature | Gforce Arms GFBP | Zev Technologies OZ9 | Agency Arms AOS Glock |
|---|---|---|---|
| Action | Semi-auto, gas-operated | Striker-fired pistol | Striker-fired pistol |
| Overall Length | 29.5” | 8.0” (pistol) | 8.5” (pistol) |
| Barrel Length | 18.5” | 5.2” | 5.2” |
| Capacity | 5+1 | 17+1 | 17+1 |
| Rail System | Picatinny (top & bottom) | Picatinny (bottom only) | Picatinny (bottom only) |
| Weight | ~6.5 lbs | ~1.5 lbs | ~1.6 lbs |
Note: The Zev OZ9 and Agency AOS are high-end pistols, not shotguns, but they represent the premium custom market. The GFBP offers a different tool entirely—a compact shotgun for home defense at a fraction of the cost.
FAQ
Can this shotgun handle both 2 3/4” and 3” shells?
Yes, the GFBP is chambered for 2 3/4” and 3” 12-gauge ammunition. It cycles both reliably, per the manufacturer specs.
What magazines are compatible?
It uses MKA-1919 magazines, which are widely available and come in various capacities. The included 5-rounder is a good start, and you can find 10- or 20-round options from aftermarket sources.
Is it easy to mount a red dot or flashlight?
Yes, the top Picatinny rail accepts standard optics mounts, and the bottom rail accepts lights, lasers, or foregrips. No drilling or gunsmithing required.
How long is the overall gun?
It measures 29.5 inches from butt to muzzle, making it one of the most compact 12-gauge semi-autos available.
Does it come with a sling?
It has a QD sling mount built into the stock, but a sling is not included. You can add any QD-compatible sling of your choice.
✓ Nationwide delivery (all 50 states) ✓ Ships 1-2 business days ✓ 30-day returns ✓ Secure checkout
Explore more options in our Semi Auto Shotguns, Home Defense Shotguns, and Bullpup Shotguns categories.
Last updated: April 2026
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