KelTec SU16C Rifle 5.56 NATO 16 in. Black 10 rd.

This is the KelTec SU16C Rifle 5.56 NATO 16 in. Black 10 rd., a gas-piston operated semi-auto that folds into a 26-inch package for transport while accepting standard AR-15 magazines. Built for shooters who want a lightweight, reliable carbine that stows tight and runs clean, the SU16C delivers a 5.56 platform with zero buffer tube complexity and a full-length Picatinny top rail for optics.

Key Features

• Gas-Piston Operating System — WHY IT MATTERS: Keeps fouling and carbon blowback out of the receiver, meaning cleaner internals and extended maintenance intervals compared to direct-impingement ARs.
• Folding Stock with 26-Inch Overall Length — WHY IT MATTERS: The stock folds to the right, collapsing the rifle to a compact package that fits in a backpack or range bag without disassembly.
• Integrated Picatinny Rail — WHY IT MATTERS: A full-length MIL-STD-1913 rail on the receiver allows direct mounting of any optic without adapter plates or proprietary bases.
• Spare Magazine Storage in Stock — WHY IT MATTERS: Two proprietary 10-round magazines store inside the buttstock, giving you a total of 30 rounds on the gun without extra pouches.
• Ambidextrous Safety Selector — WHY IT MATTERS: Left-handed shooters can manipulate the safety without shifting their grip, keeping the rifle on target during transitions.

Who It’s For

The SU16C is built for the shooter who wants a keltec su16c rifle 5.56 nato 16 in. black 10 rd. as a truck gun, survival carbine, or lightweight plinker. If you value portability over rail real estate and prefer a piston system that runs clean with minimal lubrication, this rifle fits. It also appeals to AR owners looking for a backup that shares magazine compatibility without the weight.

Pros & Cons

Pros: 4.7-pound weight makes it one of the lightest 5.56 semi-autos on the market. Piston action reduces cleaning frequency. Folds to 26 inches for easy storage. Uses standard AR-15 magazines. Integrated rail eliminates aftermarket handguard costs.

Cons: The polymer receiver lacks the durability of aluminum under hard use—per KelTec specs, the receiver is designed for standard pressure 5.56 NATO, not sustained full-auto fire. The stock’s folding mechanism can develop play over thousands of cycles.

Comparison

The SU16C undercuts both competitors on price and weight while offering a folding stock—a feature neither the OZ9 nor Super Duty provides. You sacrifice receiver rigidity and aftermarket support compared to Geissele’s mil-spec aluminum, but for a packable carbine that still runs standard AR mags, the KelTec wins on portability.

FAQ

Order Your KelTec SU16C Today

The KelTec SU16C Rifle 5.56 NATO 16 in. Black 10 rd. is in stock and ready to ship. At $725.69, this is one of the most affordable folding 5.56 rifles that still runs AR-15 magazines. According to industry data, piston-driven rifles account for roughly 12% of the semi-auto rifle market, yet the SU16C remains one of the few sub-5-pound options available.

✓ Nationwide delivery (all 50 states)
✓ Ships 1-2 business days
✓ 30-day returns
✓ Secure checkout

Browse more Semi Auto Rifles or check our KelTec Rifles collection. Also see AR-15 Magazines for spare mags.

Last updated: April 2026