The Tennessee landscape—from the rolling hills of the Cumberland Plateau to the controlled ranges outside Nashville—demands a rifle that balances compact handling with serious firepower. The RTG Parts Kel-Tec R50, chambered in 5.7x28mm, offers a 50-round capacity and a side-folding OD Green stock, making it a practical choice for rural property management, range sessions, or home defense in tighter spaces. Whether you’re a Knoxville shooter looking for a lightweight carbine or a Middle Tennessee prepper seeking a reliable semi-auto, this model delivers proven Kel-Tec engineering in a package that fits your needs.
Product Overview
The Kel-Tec R50 is a semi-automatic, gas-operated rifle built around the high-velocity 5.7x28mm cartridge. It is designed for shooters who want a high-capacity, low-recoil platform that handles like a carbine but stores like a compact rifle. This model is suited for target shooters, home defense owners, and collectors who appreciate Kel-Tec’s innovative folding design. While not intended for large-game hunting, the 5.7x28mm round is effective for varmint control and informal plinking. The R50 fills a niche for those who prioritize magazine capacity and portability without sacrificing reliability.
Key Specifications
- Caliber: 5.7x28mm
- Action: Semi-automatic, gas-operated
- Barrel Length: 16.1 inches (16.1″ overall, with standard threading for muzzle accessories)
- Overall Length: 30.5 inches (stock extended); 23.5 inches (stock folded)
- Magazine Capacity: 50 rounds (detachable box magazine)
- Stock: Side-folding, OD Green polymer
- Finish: Matte black metal components with OD Green polymer furniture
- Weight: Approximately 5.2 pounds (unloaded)
- Sights: Adjustable rear aperture and front post (integrated into receiver)
- Safety: Ambidextrous thumb safety
- Receiver: Polymer with steel inserts
Feature Deep-Dive
The Kel-Tec R50’s most distinctive feature is its side-folding stock, which reduces the rifle’s overall length to 23.5 inches when folded. This allows for easy transport in a vehicle, backpack, or safe without sacrificing barrel length. The OD Green stock provides a non-slip grip and is reinforced at the hinge for long-term durability. When deployed, the stock locks solidly, offering a consistent cheek weld for repeatable accuracy. This folding mechanism is a hallmark of Kel-Tec’s design philosophy, giving Tennessee shooters a rifle that can move from a range bag to a firing position quickly.
The 5.7x28mm chambering offers a unique balance of low recoil and high velocity. The round travels at over 2,000 feet per second, providing flat trajectories and reduced wind drift compared to traditional pistol calibers. This makes the R50 effective at distances out to 150 yards, which covers most Tennessee range scenarios and rural property lines. The gas-operated action cycles reliably with standard-pressure 5.7x28mm ammunition, reducing felt recoil to nearly rimfire levels. This is a practical advantage for newer shooters or those who want to maintain rapid follow-up shots without fatigue.
The 50-round magazine is a defining attribute of the R50. It uses a twin-drum, quad-stack design that packs significant capacity into a compact package. The magazine is constructed from impact-resistant polymer with a steel feed lip for consistent feeding. While it adds some weight to the rifle, the capacity reduces the need for frequent reloads during range sessions or defensive scenarios. The magazine release is ambidextrous and positioned near the trigger guard for intuitive operation. For Tennessee shooters who prioritize volume of fire—whether on a steel target or in a home defense plan—this magazine is a practical tool.
The R50’s sighting system includes an adjustable rear aperture and a protected front post, both integrated into the receiver. This setup provides a clean sight picture and is adjustable for windage and elevation without tools. The receiver is made from a glass-filled polymer that resists impact and environmental moisture, which is relevant for Tennessee’s humid summers. The barrel is button-rifled and chrome-lined for corrosion resistance and consistent accuracy. A standard 1/2×28 threaded muzzle allows for the addition of compensators or flash hiders, though the rifle ships with a thread protector installed.
Ergonomics on the R50 are straightforward. The pistol grip has a moderate angle and textured panels for a secure hold. The forend is slim and includes M-Lok slots for mounting lights or grips, though the factory configuration is minimalist. The trigger is a single-stage design with a pull weight around 6 to 7 pounds, which is serviceable for a defensive or range carbine. The bolt catch is located on the left side of the receiver and is easy to reach with the support hand. The charging handle is non-reciprocating and sits on the left side, reducing snag risk when carrying the rifle folded.
Durability considerations include a steel bolt carrier group with a nitride finish, which resists wear and fouling. The recoil spring assembly is captive, simplifying disassembly for cleaning. The R50 field-strips without tools, requiring only the removal of a single push pin to separate the upper and lower receiver. This makes maintenance straightforward for Tennessee gun owners who want to keep their rifle in working condition after a muddy range day or a humid storage period. The magazine well is flared for faster reloads, though the quad-stack design requires a firm insertion to ensure proper seating.
Ideal Use Cases
- Home Defense: The compact folded length and 50-round capacity make the R50 a viable option for securing a residence. The low recoil allows for quick target acquisition in confined spaces, and the 5.7x28mm round has reduced overpenetration risk compared to rifle calibers like 5.56 NATO.
- Range Shooting: The high capacity and flat trajectory make this rifle suitable for recreational shooting at indoor and outdoor ranges. Shooters can work on speed drills or precision targets without constant magazine changes.
- Varmint Control: The 5.7x28mm cartridge is effective on small pests like groundhogs and coyotes at moderate ranges. The R50’s light weight and folding stock make it easy to carry across Tennessee farmland.
- Vehicle or Truck Gun: The side-folding stock allows the R50 to be stored in a compact rifle case or behind a seat, making it a practical option for those who want a rifle accessible during travel.
Compatibility Notes
- Ammunition: The R50 is designed for standard-pressure 5.7x28mm ammunition from manufacturers like FN, Federal, and American Eagle. Do not use reloaded, handloaded, or +P ammunition. The rifle will not chamber 5.56 NATO or .223 Remington.
- Holsters: The R50 is not designed for holster carry. Use a padded rifle case or sling for transport.
- Magazines: The R50 uses proprietary 50-round magazines. Kel-Tec also offers 30-round magazines for this model. Magazines from the Kel-Tec P50 pistol are compatible.
- Accessories: The M-Lok slots on the forend accept standard M-Lok accessories such as lights, grips, and bipods. The 1/2×28 threaded muzzle accepts standard 5.7x28mm muzzle devices. Optics can be mounted via the integrated Picatinny rail on the receiver.
- Sling Mounts: The stock includes a QD sling socket, and the forend has a sling loop for two-point sling attachment.
FAQ
Q: Can this rifle be shipped to a Tennessee address?
A: Yes. We ship to licensed FFL dealers across Tennessee. You can select a local FFL during checkout. We do not ship directly to residential addresses. All Tennessee state and federal laws apply.
Q: How does the FFL transfer process work?
A: After you place your order, we will contact your chosen FFL dealer to confirm their license. You will then visit the dealer to complete a Form 4473 and pass a background check. The dealer will release the rifle to you upon approval. We provide tracking information once the rifle ships.
Q: What ammunition does this rifle use?
A: The R50 is chambered for 5.7x28mm ammunition only. It is compatible with all major brands of factory-loaded 5.7x28mm ammunition. We recommend using brass-cased ammunition for reliability. Do not use 5.7x28mm ammunition loaded for the P90 or PS90 without confirming it is standard pressure.
Q: What warranty does Kel-Tec provide?
A: Kel-Tec offers a limited lifetime warranty to the original owner. This covers defects in materials and workmanship. Warranty service is handled directly through Kel-Tec. We recommend registering your rifle with Kel-Tec after purchase. We do not provide warranty repairs in-house.
Q: What is your return policy?
A: All firearm sales are final. If your rifle arrives with a defect or damage from shipping, contact us within 48 hours of delivery. We will work with you to resolve the issue, including replacement or return if necessary. We do not accept returns for change of mind or cosmetic preferences.
The Kel-Tec R50 is a practical addition to any Tennessee shooter’s collection. It offers a high-capacity 5.7x28mm platform in a compact, folding package that suits home defense, range use, and varmint control. As a licensed Tennessee FFL retailer, we ship this rifle directly to your local dealer across the state. Browse our selection or contact us with any questions about compatibility or transfer logistics.
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