CamperHardlyKnowHer

Keystone Raptor 421CK

Fifth wheelbuilt 2018–18Mixed build tierFindable on the used market
WHAT ONE COSTS
—price not published

The maker never published an MSRP for this floorplan. Unknown is not cheap — treat any asking price against comparable models, not against zero.

WHAT IT WEIGHS BEHIND YOUR TRUCK
~17,227 lbestimated as towed, for 2 people

dry weight 15,510 lb + fresh water (110 gal, full) 917 lb + propane + battery 200 lb + gear for 2 600 lb. Brochure dry weight omits water, propane, batteries and your gear; this estimate doesn't.

You want a tow rating around19,145 lb (10% margin)
GVWR (the sticker maximum)19,000 lb
Tongue weight, loaded~3,904 lb (23%)
Cargo capacity3,490 lb
WHICH TOW VEHICLES IT FITS — 14 OF 95

Judged the way the app judges: estimated loaded weight against each vehicle's rating less a 10% margin — per model year, because the 421CK's published weights held steady. Fifth wheels also need a pickup bed and are held to the fifth-wheel rating where published.

VEHICLETOW RATINGVERDICT
Chevrolet Silverado / GMC Sierra 2500HD (Duramax, max tow) '24-2622,500 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '20-2636,000 lbfits, loaded, with 10% margin
Chevrolet Silverado / GMC Sierra 3500HD (Duramax DRW, gooseneck) '11-1923,300 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 diesel, gooseneck) '20-2222,800 lbfits, loaded, with 10% margin
Ford F-250 Super Duty (6.7 HO diesel, gooseneck) '23-2623,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '20-2237,000 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '17-1932,500 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 diesel DRW, gooseneck) '11-1621,600 lbfits, loaded, with 10% margin
Ford F-350 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2638,000 lbfits, loaded, with 10% margin
Ford F-450 Super Duty (6.7 HO diesel DRW, gooseneck) '23-2640,000 lbfits, loaded, with 10% margin
Ram 2500 (6.7 Cummins HO) '19-2620,000 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins DRW, gooseneck) '13-1831,210 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '25-2636,610 lbfits, loaded, with 10% margin
Ram 3500 (6.7 Cummins HO DRW, gooseneck) '19-2437,090 lbfits, loaded, with 10% margin
The 81it doesn't fit
  • Chevrolet Colorado / GMC Canyon (2.7 Turbo HO, tow pkg) '23-26 — over by ~10,297 lb loaded
  • Chevrolet Colorado / GMC Canyon (2.8 Duramax) '15-22 — over by ~10,297 lb loaded
  • Chevrolet Silverado / GMC Sierra 1500 (6.2 V8, max tow) '19-26 — over by ~7,957 lb loaded
  • Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '20-23 — over by ~567 lb loaded
  • Chevrolet Silverado / GMC Sierra 2500HD (Duramax) '11-19 — over by ~937 lb loaded
  • Chevrolet Silverado 1500 (max tow) '14-18 — over by ~6,787 lb loaded
  • Chevrolet Silverado EV (4WT) '24-26 — over by ~5,977 lb loaded
  • Chevrolet Suburban (5.3 V8, max tow) '21-26 — no pickup bed — cannot hitch a fifth wheel
  • Chevrolet Tahoe (5.3 V8, max tow) '21-26 — no pickup bed — cannot hitch a fifth wheel
  • Chevrolet Traverse (tow pkg) '18-26 — no pickup bed — cannot hitch a fifth wheel
  • Chrysler Pacifica '17-26 — no pickup bed — cannot hitch a fifth wheel
  • Dodge Durango (5.7 / 6.4 Hemi, tow pkg) '14-26 — no pickup bed — cannot hitch a fifth wheel
  • Ford Bronco 4-dr (2.7 EcoBoost, tow pkg) '21-26 — no pickup bed — cannot hitch a fifth wheel
  • Ford Expedition (3.5 EcoBoost, tow pkg) '18-24 — no pickup bed — cannot hitch a fifth wheel
  • Ford Expedition (3.5 EcoBoost, tow pkg) '25-26 — no pickup bed — cannot hitch a fifth wheel
  • Ford Explorer (3.0 EcoBoost, tow pkg) '20-26 — no pickup bed — cannot hitch a fifth wheel
  • Ford F-150 (3.5 EcoBoost, max tow) '24-26 — over by ~7,507 lb loaded
  • Ford F-150 (3.5 EcoBoost, max tow) '11-14 — over by ~7,057 lb loaded
  • Ford F-150 (3.5 EcoBoost, max tow) '15-20 — over by ~6,517 lb loaded
  • Ford F-150 (3.5 EcoBoost, max tow) '21-23 — over by ~4,627 lb loaded
  • Ford F-150 Lightning (max trailer tow) '22-26 — over by ~8,227 lb loaded
  • Ford F-250 Super Duty (6.7 diesel, tow pkg) '17-19 — over by ~1,027 lb loaded
  • Ford F-250 Super Duty (6.7 diesel) '11-16 — over by ~2,287 lb loaded
  • Ford Maverick (2.0 EcoBoost, 4K tow pkg) '22-26 — over by ~13,627 lb loaded
  • Ford Ranger (2.3 EcoBoost, tow pkg) '19-23 — over by ~10,477 lb loaded
  • Ford Ranger (2.7 EcoBoost, tow pkg) '24-26 — over by ~10,477 lb loaded
  • Ford Transit (HD tow pkg) '15-26 — no pickup bed — cannot hitch a fifth wheel
  • GMC Acadia (tow pkg) '20-26 — no pickup bed — cannot hitch a fifth wheel
  • GMC Hummer EV Pickup '22-26 — over by ~10,477 lb loaded
  • GMC Sierra EV '24-26 — over by ~6,427 lb loaded
  • GMC Yukon / Yukon XL (5.3 V8, max tow) '21-26 — no pickup bed — cannot hitch a fifth wheel
  • Honda Odyssey '18-26 — no pickup bed — cannot hitch a fifth wheel
  • Honda Passport (AWD) '19-26 — no pickup bed — cannot hitch a fifth wheel
  • Honda Pilot (AWD, tow pkg) '16-26 — no pickup bed — cannot hitch a fifth wheel
  • Honda Ridgeline (AWD) '17-26 — over by ~12,727 lb loaded
  • Hyundai Palisade (tow pkg) '20-26 — no pickup bed — cannot hitch a fifth wheel
  • Hyundai Santa Cruz (2.5T AWD) '22-26 — over by ~12,727 lb loaded
  • Jeep Gladiator (3.6 V6, max tow) '20-26 — over by ~10,297 lb loaded
  • Jeep Grand Cherokee (5.7 Hemi) '11-21 — no pickup bed — cannot hitch a fifth wheel
  • Jeep Grand Cherokee (WL, tow pkg) '22-26 — no pickup bed — cannot hitch a fifth wheel
  • Jeep Grand Cherokee L (5.7 Hemi) '21-26 — no pickup bed — cannot hitch a fifth wheel
  • Jeep Grand Wagoneer (Hurricane, max tow) '22-26 — no pickup bed — cannot hitch a fifth wheel
  • Jeep Wagoneer (Hurricane, max tow) '22-26 — no pickup bed — cannot hitch a fifth wheel
  • Jeep Wrangler Unlimited 4-dr (tow pkg) '18-26 — no pickup bed — cannot hitch a fifth wheel
  • Kia Telluride (tow pkg) '20-26 — no pickup bed — cannot hitch a fifth wheel
  • Land Rover Defender '20-26 — no pickup bed — cannot hitch a fifth wheel
  • Land Rover Discovery '17-26 — no pickup bed — cannot hitch a fifth wheel
  • Lexus GX 550 (tow pkg) '24-26 — no pickup bed — cannot hitch a fifth wheel
  • Lexus LX 600 '22-26 — no pickup bed — cannot hitch a fifth wheel
  • Mazda CX-90 (3.3 turbo, tow pkg) '24-26 — no pickup bed — cannot hitch a fifth wheel
  • Mercedes-Benz Sprinter '19-26 — no pickup bed — cannot hitch a fifth wheel
  • Nissan Armada (3.5 twin-turbo, tow pkg) '25-26 — no pickup bed — cannot hitch a fifth wheel
  • Nissan Armada (tow pkg) '17-24 — no pickup bed — cannot hitch a fifth wheel
  • Nissan Frontier (3.8 V6, tow pkg) '22-26 — over by ~10,792 lb loaded
  • Nissan Pathfinder (tow pkg) '22-26 — no pickup bed — cannot hitch a fifth wheel
  • Nissan Titan (5.6 V8, tow pkg) '17-24 — over by ~8,442 lb loaded
  • Nissan Titan XD (Cummins diesel) '16-19 — over by ~5,787 lb loaded
  • Ram 1500 (3.0 Hurricane, max tow) '25-26 — over by ~6,777 lb loaded
  • Ram 1500 (5.7 Hemi eTorque, max tow) '19-24 — over by ~5,752 lb loaded
  • Ram 1500 (5.7 Hemi, max tow) '11-18 — over by ~7,667 lb loaded
  • Ram 2500 (6.7 Cummins) '11-18 — over by ~1,047 lb loaded
  • Ram ProMaster '14-26 — no pickup bed — cannot hitch a fifth wheel
  • Rivian R1S '22-26 — no pickup bed — cannot hitch a fifth wheel
  • Rivian R1T '22-26 — over by ~7,327 lb loaded
  • Subaru Ascent '19-26 — no pickup bed — cannot hitch a fifth wheel
  • Subaru Outback (XT / Wilderness) '20-26 — no pickup bed — cannot hitch a fifth wheel
  • Tesla Cybertruck '24-26 — over by ~7,327 lb loaded
  • Tesla Model X (tow pkg) '16-26 — no pickup bed — cannot hitch a fifth wheel
  • Tesla Model Y (tow pkg) '21-26 — no pickup bed — cannot hitch a fifth wheel
  • Toyota 4Runner (4.0 V6) '11-24 — no pickup bed — cannot hitch a fifth wheel
  • Toyota 4Runner (i-Force Max) '25-26 — no pickup bed — cannot hitch a fifth wheel
  • Toyota Grand Highlander (i-Force Max) '24-26 — no pickup bed — cannot hitch a fifth wheel
  • Toyota Highlander (tow pkg) '20-26 — no pickup bed — cannot hitch a fifth wheel
  • Toyota Land Cruiser (i-Force Max) '24-26 — no pickup bed — cannot hitch a fifth wheel
  • Toyota Sequoia (i-Force Max, tow pkg) '23-26 — no pickup bed — cannot hitch a fifth wheel
  • Toyota Sienna '21-26 — no pickup bed — cannot hitch a fifth wheel
  • Toyota Tacoma (i-Force Max, tow pkg) '24-26 — over by ~11,377 lb loaded
  • Toyota Tacoma (V6, tow pkg) '16-23 — over by ~11,107 lb loaded
  • Toyota Tundra (5.7 V8, tow pkg) '11-21 — over by ~8,047 lb loaded
  • Toyota Tundra (i-Force Max, tow pkg) '22-26 — over by ~6,427 lb loaded
  • Volkswagen Atlas (tow pkg) '18-26 — no pickup bed — cannot hitch a fifth wheel
THE SPECS
Length43.5 ft
Height (incl. A/C)13.5 ft
Width8.3 ft
GVWR19,000 lb
Dry weight15,510 lb
Dry tongue weight3,515 lb
Cargo capacity3,490 lb
Sleeps7
Axles3
Fresh water110 gal
Grey water82 gal
Black water44 gal
Air conditioning30,000 BTU

A missing row means the maker never published that figure — unknown, not zero.

WHERE PEOPLE SLEEP
  • 1× Front queen bed(Permanent)—
  • 2× Garage electric beds(Stow-away)—
  • 2× Garage dual opposing flip-down sofas(Convertible)—
HOW IT'S BUILT — 4/5
WallsLaminated fiberglass
FrameAluminum
RoofWalk-on
UnderbellyEnclosed

Keystone (Mixed tier): Keystone RV

YEAR BY YEAR — WHAT CHANGED
  • 2018Documented in the 2018 model-year brochure
FINDING ONE

Findable — a few listed nationwide most weeks. Why: Keystone is a volume manufacturer; only one model year. Estimated from build volume and production span — not a count of live listings.

THE READ

'CK' cook's-kitchen layout; a popular full-timer plan still seen on the used market.

OTHER RAPTOR FLOORPLANS
351 · 17,000 lb · sleeps 7352 · 19,475 lb · sleeps 7353TS · 17,000 lb · sleeps 7355TS · 17,000 lb · sleeps 7362 · 17,000 lb · sleeps 7362TS · 17,000 lb · sleeps 7398TS · 19,000 lb · sleeps 7415 · 21,000 lb · sleeps 7420 · 20,000 lb · sleeps 7424 · 20,000 lb · sleeps 8424TS · 19,000 lb · sleeps 7425TS · 19,000 lb · sleeps 7426TS · 19,000 lb · sleeps 7428 · 20,000 lb · sleeps 7the whole line →
Is the 421CK your #1 — or just a spec sheet?

These are the facts. Whether it beats the other six thousand rigs for you depends on what you care about — set your priorities as sliders and watch the whole market re-rank around them. Nothing gets hidden, everything gets explained.

Rank it against your setup →

Data compiled from dealer and aggregator listings, retrieved 2026-07.