RUGER AC-556 for Sale
Browse Ruger AC-556 listings from verified sellers across the U.S. on GunsAmerica.
Designed in the late 1970s, the Ruger AC-556 is a selective-fire variant of the Mini-14 developed for law enforcement and military use. Built for compact firepower and reliability, it offers a folding stock and burst capability in a manageable 5.56 NATO platform. Though discontinued, it remains sought after by collectors and Class III enthusiasts.
Why It's a Top Choice
- Selective-fire capability with semi, burst, and full-auto modes
- Compact folding stock suits vehicle or tactical use
- Chambered in 5.56 NATO for wide ammo availability
- Proven Mini-14 action ensures dependability
- Pre-ban status appeals to collectors and NFA buyers
Key Variants
Ruger AC-556F
Features a side-folding metal stock and shortened barrel for tactical or vehicle use.
Ruger AC-556K
Carbine variant with 13-inch barrel and flash suppressor; ideal for compact firepower.
Ruger AC-556
Standard full-length model with wood stock; designed for general law enforcement service.
Competitor Comparison Table
| Feature | Ruger AC-556 | Colt M16A1 | FN FNC |
|---|---|---|---|
| MSRP | Discontinued | Discontinued | Discontinued |
| Capacity | 20 or 30 rounds | 20 or 30 rounds | 30 rounds |
| Weight | ~7.0 lbs | ~6.4 lbs | ~8.59 lbs |
| Optics-Ready | No (can be modified) | No | Yes |
| Trigger Type | Standard Ruger | Military single-stage | Select-fire military |
| Notable Pro | Compact and lightweight | Widely fielded with NATO militaries | Optics and modern features |
| Notable Con | Limited aftermarket, no longer produced | Heavier recoil, dated design | Very scarce in U.S. |
Best Use Cases
- Law enforcement collectibles
- Class III firearm collecting
- Historical firearms study
- Range practice (full-auto experience)
FAQs
Can I own a Ruger AC-556 legally?
Yes, if it is a registered transferable NFA item made before May 1986 and you meet ATF requirements.
What is the fire mode selector on the Ruger AC-556?
It allows safe, semi-auto, 3-round burst, and full-auto modes via a selector near the rear receiver.
How does the Ruger AC-556 differ from a Mini-14?
The AC-556 adds select-fire capability, flash hider, and adjustable rear sight to the standard Mini-14 platform.
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