KelTec R50 5.7x28mm 16.10″ Threaded Tan 50+1
Video review
Expert review
About this product
The KelTec R50 is a semi-automatic carbine chambered in 5.7x28mm that combines a compact folding stock design with a 50+1 round capacity and 16.10″ threaded barrel. This platform bridges the gap between pistol-caliber carbines and full-power rifle rounds, offering unique ballistic characteristics in a transport-friendly package. Its ambidextrous controls and Picatinny rail make it adaptable for various shooting applications while maintaining NFA-compliant barrel length.
What is the KelTec R50 used for?
The KelTec R50 serves as a high-capacity defensive or recreational shooting platform optimized for the 5.7x28mm cartridge. Its 50-round magazine capacity and semi-automatic operation make it suitable for tactical training, while the folding stock and 21.5″ minimum length allow for compact storage in vehicles or safes. The threaded 1/2"-28 muzzle accepts suppressors or compensators, enhancing its versatility for range use.
How does the KelTec R50 compare to the Stevens 334 Rifle?
The KelTec R50 offers significantly higher capacity and faster follow-up shots than the Stevens 334 Rifle in .308 Win, which holds only 4 rounds and requires manual cycling. While the Stevens delivers more energy per shot at longer ranges, the R50's 50-round magazine and semi-auto operation provide superior volume fire capability within 100 yards, making it better for rapid engagement scenarios.
What does it weigh and what are the dimensions?
The R50 weighs 3.48 lbs (55.7 oz) and measures 21.50" to 30.50" overall depending on stock position. With the stock folded, it reaches its minimum length of 21.50", while extended it spans 30.50"—making it approximately 6" shorter than most traditional carbines when collapsed. The 16.10" barrel maintains legal length without NFA registration requirements.
Who is this NOT for?
The R50 isn't suitable for hunters requiring ethical takedown power beyond 150 yards or precision shooters needing sub-MOA accuracy. The 5.7x28mm cartridge lacks the energy for larger game, and the polymer construction and iron sights limit practical accuracy to about 3-4 MOA. Traditional bolt-action users like the Stevens 334 in .243 Win will find this platform too specialized for their needs.
What's in the box?
The package includes the carbine with one 50-round magazine, owner's manual, and cable lock. Unlike some competitors, it does not include optics, sling, or cleaning kit—expect to spend an additional $150-$300 for essential accessories. The QD sling mount is pre-installed but requires separate hardware purchase.
Is the KelTec R50 worth it at $758.99?
At $758.99, the R50 justifies its price for shooters specifically wanting high-capacity 5.7x28mm performance in a compact platform. The 50-round capacity dwarfs most semi-auto carbines, and the folding stock adds legitimate utility for storage. However, ammunition costs approximately $0.45 per round—nearly double 9mm—making sustained practice expensive compared to more common calibers.
Specs at a glance
Pros & cons
What works
- 50-round capacity—double most PCC magazines
- Folds to 21.5"—fits in compact storage spaces
- Weighs 3.48 lbs—1.2 lbs lighter than CZ Scorpion EVO 3
- Ambidextrous controls—fully left-right convertible
Trade-offs
- Proprietary magazines—$42.99 each, no aftermarket options
- 5.7x28mm ammo costs $0.45/rd—2x 9mm expense
- Polymer grip lacks texture—requires $25 stippling or tape
- Iron sights only—add $150+ for optic-ready usability
Key attributes
| upc | 640832009316 |
| manufacturer | KelTec |
| manufacturer part number | R50TAN |
| action | Semi-Auto |
| barrel finish | Black |
| barrel length | 16.10" |
| caliber/gauge | 5.7 x 28 mm |
| capacity | 50 + 1 |
| product type | Carbine |
| safety | Ambidextrous |
| shipping weight | 7.2 |
| sights | Adj Iron |
| thread pattern | 1/2"-28 |
Frequently asked questions
- Is it compatible with FN Five-seveN magazines?
- No, the R50 uses proprietary KelTec magazines—FN Five-seveN magazines are not compatible. The included 50-round magazine is specific to this model and costs $42.99 for replacements. Aftermarket options are limited as of 2023.
- Does it fit in a standard rifle case?
- Yes, when folded to 21.5", it fits most 24" rifle cases with 2" clearance. For reference, a Pelican 1750 case (47.5" internal) accommodates it with optics attached. The folded profile is similar to many SBRs without the tax stamp requirement.
- How long does shipping take to Montana?
- Ironclad Armory processes firearms in 2 business days with 3-5 day transit to most states. Montana deliveries typically require 7 total days from order to FFL arrival. All shipments require adult signature and FFL coordination.
- Can I return it if it doesn't cycle properly?
- Firearms are final sale unless defective—returns require manufacturer warranty claims through KelTec. Ironclad Armory provides a 1-year warranty support but does not accept returns on functioning firearms. Inspect at your FFL before transfer.
- Does this work with SilencerCo Omega 9K?
- Yes, the 1/2"-28 threads direct-thread compatible with SilencerCo Omega 9K and other 9mm/.36 cal suppressors. However, 5.7x28mm generates higher pressure—verify suppressor rating for 5.7mm use. Expect 12-15 dB reduction with appropriate models.