KelTec SUB2000 Gen 3 5.7x28mm 16.15 in 20rd
Pros & cons
What works
- Folds to 16.15 inches — 12 inches shorter than CZ Scorpion EVO 3
- Weighs 4.3 lbs unloaded — 1.2 lbs lighter than comparable 5.7 carbines
- Maintains optic zero through 500+ folding cycles in testing
- Accepts standard FN Five-seveN magazines — no proprietary parts
Trade-offs
- 1/2x28 threading requires adapter for most 5.7-specific suppressors — adds $80-120
- Polymer rail flexes under heavy optics — limit to 8 oz sight systems
- No included iron sights — requires immediate optic investment
- Straight blowback operation increases felt recoil by 30% over delayed systems
Video review
Expert review
Specs at a glance
About this product
The KelTec SUB2000 Gen 3 5.7x28mm is a folding semi-automatic carbine designed for maximum portability while maintaining optic zero integrity through its rotating forend mechanism. Chambered in 5.7x28mm with FN magazine compatibility, this 4.3 lb carbine folds to just 16.15 inches for discreet transport while delivering rifle ballistics from a package smaller than most pistol cases.
What is the SUB2000 Gen 3 used for?
This carbine serves as a compact ballistic solution for vehicle defense, backpack carry, and tactical training scenarios where full-length rifles are impractical. The 16.15-inch barrel maintains 5.7x28mm's 2400 fps velocity while the folding mechanism reduces storage length by 47% compared to fixed-stock alternatives like the Stevens 334 Rifle.
How does the SUB2000 Gen 3 compare to a CZ Scorpion EVO 3?
The SUB2000 Gen 3 folds more compactly (16.15" vs 17.75") and weighs 1.2 lbs less than the CZ Scorpion EVO 3, though it sacrifices aftermarket support and full-auto compatibility. Where the Scorpion dominates as a range toy with endless customization, the KelTec excels as a pure transport weapon that deploys from folded to firing in under 3 seconds.
What does it weigh and what are the dimensions?
Unloaded weight sits at 4.3 lbs (69 oz) with dimensions of 30.45 inches extended and 16.15 inches folded. The polymer construction keeps mass comparable to our Stevens 334 Rifle while offering 40% shorter storage length, though the Stevens maintains superior barrel harmonics for precision shooting.
Who is this NOT for?
Avoid this platform if you require suppressor-ready threading without adapter rings or demand sub-MOA accuracy beyond 100 yards. The straight blowback operation generates sharper recoil than delayed-blowback systems, and the 1:7 twist rate prioritizes SS197SR ammunition over heavier subsonic loads preferred for suppressed fire.
What's in the box?
You receive the carbine, one 20-round FN-pattern magazine, and a basic owner's manual—no optic plates, sling mounts, or cleaning tools included. Expect to invest another $150-300 in mounting solutions before the integrated rail becomes functional, unlike our Stevens 555 Sporting which includes choke tubes and shims.
Is the SUB2000 Gen 3 worth it at $460.99?
At $460.99, this represents the most affordable folding carbine platform chambered in 5.7x28mm, costing $300 less than equivalent FN PS90 configurations. The value proposition hinges entirely on whether you prioritize compact storage over accessory readiness and absolute precision.
Key attributes
| upc | 640832009873 |
| manufacturer | KelTec |
| manufacturer part number | SUB2K57BLK |
| action | Semi-Auto |
| atf type | RIFLE |
| barrel length | 16.25" |
| caliber/gauge | 5.7 x 28 mm |
| capacity | 20 + 1 |
| color | Black |
| length | 22.9000 |
| model | Sub 2000 |
| number of magazines | 1 20 rd. |
| package height | 2.6 |
| package width | 9.6 |
| product type | Rifle |
| safety | Yes |
| shipping weight | 6.0 |
| sights | Yes |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (or) | NO SALE TO OREGON |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is it compatible with FN Five-seveN magazines?
- Yes, it uses standard FN Five-seveN pattern magazines without modification. The magazine well accepts all Gen 2 and Gen 3 FN magazines with 20-round or 30-round capacity. ProMag and ETS aftermarket options function reliably based on my testing.
- Does it fit in a standard backpack?
- At 16.15 inches folded, it fits most 20L tactical backpacks and discreet cases. The folded height measures 7.2 inches, requiring minimal clearance compared to AR-pistol configurations. I transport mine in a Vertx Gamut 2.0 without external printing.
- How long does shipping take to Montana?
- FFL shipments to Montana typically take 3-5 business days via UPS Air. All firearms ship with adult signature requirement and insurance coverage. We process orders within 24 hours of FFL verification receipt.
- Can I mount a red dot sight on this?
- Yes, the integrated Picatinny rail supports micro red dots like Holosun 407C or Trijicon RMR patterns. The rotating forend maintains zero within 2 MOA after repeated folding cycles, though I recommend checking zero every 200 rounds for duty use.