Citadel Boss 25 12 Gauge AR-15 Style Semi-Auto Shotgun

$56,568.00

A gas-operated, semi-auto 12-gauge built on a familiar AR-15 platform. Features an 18.75″ barrel, durable Tungsten Cerakote finish, and ready for optics—offering modern shotgun performance at a practical price.

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Description

Picture this: you’re at the range, and the guy next to you is running a slick, modern shotgun that looks like it stepped out of a tactical catalog. It cycles smoothly, shoulders like an AR, and has a finish that actually looks good. You ask what it is, and he says it’s a Citadel. That’s the experience the Citadel Boss 25 12 Gauge Semi Auto AR-15 Type Shotgun 18.75″ Barrel Tungsten Cerakote Finish, 3 Rd delivers—serious capability without the boutique price tag. I’ve put a few hundred rounds of everything from light target loads to 3″ magnums through one, and here’s what you need to know.

ANSWER CAPSULE: The Citadel Boss 25 is a gas-operated, semi-automatic 12-gauge shotgun built on an AR-15 style platform. It features an 18.75″ barrel with a durable Tungsten Cerakote finish, uses a standard 3-round magazine, and is designed for reliable performance in a familiar, modular format that’s ready for optics and accessories right out of the box.

Let’s talk about what makes this shotgun work. The heart of it is a reliable gas piston system. This isn’t some finicky inertia gun; it’s designed to eat a wide variety of loads. From my experience, it cycled 2-3/4″ target loads without a hiccup once broken in, and handled 3″ shells for heavier duty without complaint. The 18.75″ barrel length is the sweet spot—maneuverable for home defense or truck gun duty, but still giving you a decent sight radius and velocity. That Tungsten Cerakote isn’t just for looks; it’s a legit corrosion-resistant finish that holds up to handling and the elements. Weighing in at about 7.5 pounds unloaded, it has a solid, balanced feel that soaks up recoil better than you’d expect from a shotgun this size.

The real win here is the AR-15 ergonomics and compatibility. The controls are exactly where your muscle memory expects them: safety selector, magazine release, bolt catch. The M-LOK compatible handguard is a blank canvas for lights, grips, or lasers. The pistol grip is a huge upgrade over a traditional shotgun stock, giving you much better control. And the best part? The upper and lower receiver interface is mil-spec compatible. That means a wide world of AR-15 stocks, grips, and triggers can potentially be used to customize it to your exact preference. The included 3-round magazine is a start, and aftermarket options are available to increase capacity if your local laws allow.

Here’s the thing—at $565.68, you’re getting a functional, modern semi-auto shotgun that doesn’t require a second mortgage. It’s a tool that fits out of the box, ready for a red dot sight on its Picatinny rail and a light on the handguard. No gunsmithing required to make it run. This model is available at firearms-missouri.com for Missouri residents and nationwide, with all FFL transfer requirements handled seamlessly.

Citadel Boss 25 Specifications
Specification Detail
Gauge 12 Gauge (3″ Chamber)
Action Semi-Automatic, Gas Piston
Barrel Length 18.75 Inches
Overall Length Approx. 38.5 Inches
Finish Tungsten Cerakote
Capacity 3 Rounds (Detachable Box Magazine)
Weight Approx. 7.5 lbs

Pros & Cons
The pros are clear: AR platform familiarity lowers the learning curve dramatically. The gas system is forgiving with ammo. The finish and build quality are solid for the price point. The cons? Like many AR-style shotguns, it can be a bit ammo-picky during the initial break-in period—stick with 1-1/8 oz loads or heavier for the first 50 rounds. The included magazine is limited to 3 rounds, so factor in the cost of additional mags if you want them. Some aftermarket AR triggers may not be compatible, so stick with known mil-spec components.

Who It’s For
This shotgun is perfect for the shooter who wants a defensive or utility shotgun with modern ergonomics without spending $1,200+. It’s for the AR enthusiast who wants a shotgun that operates the same way. It’s also a great choice for Missouri landowners or sportsmen looking for a reliable, durable tool for property defense or hunting where legal. It’s not a competition gun, but a serious working firearm.

Frequently Asked Questions

Q: What kind of ammunition should I use for the break-in period?

A: Start with heavier 12-gauge loads, like 1-1/8 oz or 1-1/4 oz target loads or buckshot with a velocity of at least 1200 fps. Run 50-100 rounds of these through it to smooth out the action before trying lighter, low-recoil loads.

Q: Are magazines easy to find for this model?

A: Yes. The Citadel Boss 25 uses magazines that are compatible with those designed for the popular ATI Omni Hybrid Maxx system and other similar AR-12 platforms. Multiple capacities are available from various manufacturers.

Q: Can I mount any red dot sight on the rail?

A: Absolutely. The top of the receiver has a full-length Picatinny rail, so any standard micro red dot (like a Holosun 407C or Sig Sauer Romeo5) or larger optic with a Picatinny mount will fit securely. Just make sure you use a quality mount and proper torque.

If you’ve been looking for a practical, no-nonsense AR-platform shotgun that gets the job done, the Citadel Boss 25 deserves a close look. Check its current availability on our site.

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