Ruger AR-556
5.56 NATO · 16.1" · 30+1
Mossberg 590 Tactical 12ga
18.5" · 6+1
| AR-15 (e.g., Ruger AR-556) | Pump shotgun (e.g., Mossberg 590) | |
|---|---|---|
| Capacity | 30+1 listed | Typically 5–8+1 |
| Recoil | Light | Heavy with full-power buck |
| Reloading | Fast magazine change | Slow, practice-dependent |
| Manual of arms | More controls | Very simple; must run the pump |
| Practice cost | Generally lower per round | Generally higher per round |
Capacity and reloading
An AR with a standard magazine holds several times what a pump shotgun holds, and reloading is a single fast motion. Shotguns are reloaded shell by shell, which under stress is slow for anyone without practice. Where magazine limits apply under state law, factor that in.
Recoil and ease of shooting
5.56 recoil is mild. A 12-gauge with full-power buckshot kicks hard, and a pump requires you to cycle the action forcefully — "short-stroking" under stress is a common failure. For recoil-sensitive shooters, the AR (or a 9mm carbine) is usually the more forgiving choice.
Penetration through walls: the myth and the reality
A common belief is that rifles are dangerous indoors because they "go through everything." Independent material tests commonly report the opposite pattern for light, fast-fragmenting 5.56 loads: they tend to break up in building materials and can pass through fewer layers than buckshot or heavy pistol bullets. But the key point stands for every option: all effective defensive loads can pass through interior walls. Load choice matters, and so does knowing your home. BulkAmmoFinder's 5.56 vs 9mm drywall article goes deeper.
Close-range effectiveness
At in-home distances, a shotgun delivers multiple projectiles with one trigger press, which is why it has such a strong reputation. But pellets must still be aimed — patterns are tight at room distances (see how to pattern).
Noise
Both are extremely loud indoors. Short-barreled rifles and muzzle brakes make it worse. Consider keeping electronic hearing protection with the gun and, where legal, a suppressor.
Practice cost
Practice is what makes either option work, and 5.56/.223 range ammunition is generally cheaper per round than buckshot. Check current bulk options at BulkAmmoFinder.
Our take
If you'll train regularly, the AR is the higher-performing tool for most shooters. If you want a simple gun that lives in a closet and gets occasional practice, a budget pump shotgun with a light and good buckshot is a sound choice. Either way, add a weapon light.
Streamlight TLR-1 HL
listed at 1,000 lumens
Weapon lights — full category
Frequently asked questions
Does 5.56 overpenetrate more than buckshot?
Not necessarily. Independent material tests commonly report that light, fast 5.56 loads can pass through fewer layers of building material than buckshot or heavy pistol bullets — but all effective defensive loads can pass through interior walls.
Which is easier for a beginner?
Many people find an AR easier: it recoils less, holds more rounds and reloads faster. A pump shotgun requires practice to run the action under stress.
Is an AR too loud indoors?
Any firearm fired indoors is extremely loud and can cause hearing damage. Shorter barrels and muzzle devices can make it worse.
Which is cheaper to practice with?
Generally the AR — 5.56/.223 range ammunition usually costs less per round than 12-gauge buckshot.
Keep reading
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