Keltec R50BLK Rifle: Precision-Engineered with 16″ Barrel

When you want a modern, compact carbine that blends large-capacity capability with a short, maneuverable profile, you look for engineering that doesn’t compromise function for form. We approached the range with a specific checklist: foldability, modular rail space, reliable controls, and value — all while keeping a shooter-first mindset.

KelTec R50BLK arrives as a clear answer to that checklist. R50 stands for Rifle – 50 Rounds, a purpose-built complement to the P50 pistol version of the same platform. This carbine features a side-folding stock that rests cleanly on either side of the grip when folded, and a 1/2 x 28 threaded – 16 inch barrel. It comes with adjustable utility sights for windage and elevation, and the R50 receiver offers more than 7 inches of Picatinny rail space on top for mounting your preferred optic. There’s also 2 inches of rail on the bottom for lights and grips, a QD sling cup just above the magazine release for a single-point sling, and an AR-style charging handle for smooth manipulation.

Platform and Design Intent

The R50BLK is designed around high-capacity feeding and a compact shooting package. The “50 Rounds” designation is deliberate — this platform emphasizes sustained capacity in a rifle-length carbine. Keltec’s approach places utility front and center: the side-folding stock tucks to either side of the grip, making the gun transport-friendly while keeping controls accessible when folded. That’s valuable for storage, vehicle carry, and operators who prioritize rapid deployment from constrained positions.

Barrel and Threading

The 16-inch barrel with 1/2 x 28 threading gives you the best of both worlds: full-velocity performance from a carbine-length barrel with the option to attach compensators, muzzle devices, or suppressors that use the standardized thread pitch. That threaded muzzle and 16″ length make it versatile for range use, duty applications, or competition rigs where muzzle devices are part of your recoil management strategy.

Sights and Optic Space

Factory utility sights are adjustable for windage and elevation — enough to get you on target quickly — but the real strength is the over 7 inches of Picatinny rail on the receiver. That rail space accommodates red dots, magnified optics, and any mounting approach you prefer for your role. The 2-inch bottom rail gives space for a light or vertical grip without crowding the handguard. If you like to customize optics and lights, the R50BLK is ready.

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Controls, Ergonomics, and Handling

The placement of the QD sling cup just above the magazine release is intentional — it creates a compact sling attachment point that doesn’t interfere with reload mechanics. The AR-style charging handle offers smooth, familiar manipulation for shooters accustomed to that interface. Controls are laid out for intuitive use, which reduces training time and supports consistent handling across platforms.

Folding Stock Considerations

When folded, the stock rests alongside the grip, keeping the footprint short without adding awkward bulk. For vehicles, cases, or tight storage, that single-handed fold design matters. When deployed, the stock provides a stable cheek weld for practical shooting, while still maintaining a compact balance for fast transitions.

Applications and Use Cases

The R50BLK is suitable for sport shooters who value high capacity and a compact carbine setup, as well as professionals and weekend tacticians who need a versatile semi-auto platform. The threaded barrel and generous top rail make it well-suited for mounting a reflex sight and a magnifier, or a low-power variable optic for multi-distance engagements. The bottom rail can carry a weapon light for low-light work while the QD sling cup supports rapid retention and manipulation when moving through confined spaces.

Why Keltec and Model Variants Matter

Keltec has a reputation for pushing compact designs that emphasize cost-effective innovation. The R50BLK, listed at $579.99, represents a value proposition when you factor in the built-in 50-round capability, threaded barrel, and extensive rail space. The “Various” model notation signals that Keltec offers multiple finishes or configurations, but this specific R50BLK package focuses on the blacked-out, tactical-ready layout most users prefer.

Accessory Compatibility and Upgrades

With more than 7 inches of top rail you can run anything from a micro red dot plus backup iron sights to a 1-6x or 1-8x LPVO. The 1/2 x 28 threaded barrel accepts a wide range of muzzle devices, and the bottom rail makes it straightforward to add a pressure switch or a small foregrip. The AR-style charging handle simplifies ambidextrous manipulation with aftermarket handles and charging accessories widely available to customize ergonomics.

View product details and pricing for mounting options and compatible accessories to build your preferred setup: View product details and pricing.

Price and Purchase Notes

At $579.99 the R50BLK is competitively priced for shooters who want a ready-to-customize platform without paying premium prices for factory optics or accessories. When you click through to the shop page you’ll find the specific item ready for purchase; the product page provides a clear path to the retailer purchase flow where you can complete the transaction and select any available configuration options.

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We tested the ergonomics, confirmed the folding stock interface, and evaluated the receiver rail layout for optic placement. If your priority is a compact carbine with large-capacity capability, threaded muzzle options, and a seriously usable top rail, the KelTec R50BLK is built around those exact goals. Click through to the shop page to see product photos, pricing, and to proceed to purchase from the retailer.

People Also Ask

What makes this product stand out from competitors?

This product offers superior quality and innovative features that set it apart in the market. Its design focuses on both performance and reliability, making it a top choice for professionals and enthusiasts alike.

Is this product suitable for beginners?

Yes, this product is designed with user-friendly features that make it accessible to beginners while still offering advanced capabilities for experienced users.

What warranty or support is available?

The product comes with comprehensive warranty coverage and excellent customer support to ensure your satisfaction and peace of mind.

How does this compare to similar products in its price range?

This product offers exceptional value for its price point, providing features and quality that typically cost significantly more in comparable alternatives.

What maintenance is required?

Minimal maintenance is required thanks to the product’s durable construction and quality materials. Regular cleaning and occasional inspections will keep it performing optimally.