01 What makes the 2021 319MLOK different
The Eagle 319MLOK sits in the full-size tier of Jayco's Eagle fifth wheels, above the half-ton Eagle HT and below the luxury North Point and Pinnacle coaches. This page covers one model year of it — the 2021 319MLOK, exactly as Jayco published it — because the numbers that decide whether your truck can pull this trailer are not the same from one year to the next.
For the 2021 model year Jayco published 2,055 pounds of published cargo capacity. Check the loaded pin against the truck's payload and rear-axle ratings rather than against the tow rating alone.
This is the earliest 319MLOK model year with a verified factory record in this catalogue. Later years are linked at the foot of the page, each with its own published figures.
A 2021 coach is 5 model years old as of 2026, which puts it squarely in used-buyer territory. Section 05 sets out what to inspect on a laminated-wall fifth wheel of this age — tyre date codes, roof and seam sealant, slide seals, and the soft-floor and delamination checks that separate a tidy coach from an expensive one.
02 Full 2021 specifications
Dimensions
- Exterior length
- 36' 7"
- Exterior width
- Not published
- Width, slides out
- Not published
- Exterior height
- Not published
- Exterior height (w/ A/C)
- 12' 11"
- Interior height (main)
- 8' 7"
Weights
- Dry / unit base weight (UVW)
- Not published
- GVWR (max loaded)
- 12,995 lbs
- Net cargo / payload (CCC)
- 2,055 lbs
- Dry pin weight
- Not published
Running gear
- Tire size
- Not published
- Hitch type
- Fifth-wheel (in-bed)
- Model year of record
- 2021
Capacities
- Fresh water
- 81 gal
- Grey water
- Not published
- Black water
- 50 gal
- LP / propane
- Not published
- LP / propane, optional
- Not published
Galley & systems
- Water heater
- Not published
- Furnace output
- Not published
- Furnace, auto-ignition
- Not published
- Outside storage compartments
- Not published
Sleeping
- Sleeps
- 4-6
03 What changed for the 2021 model year
2021 is the earliest model year of the 319MLOK that this catalogue has a verified factory record for, so there is no earlier year here to compare it against. The years we do publish run 2021 to 2025; each one is linked below.
| Model year | Dry (UVW) | GVWR | Dry pin | Sleeps | Tire size |
|---|---|---|---|---|---|
| 2021 | Not published | 12,995 | Not published | 6 | Not published |
| 2022 | 11,170 | 12,995 | 2,023 | 4 | Not published |
| 2023 | 10,830 | 12,995 | 2,020 | 6 | ST235/85R16'E' |
| 2024 | 10,940 | 12,995 | 2,145 | 6 | ST235/85R16'E' |
| 2025 | 11,030 | 13,300 | 2,255 | 4 | ST235/85R16'E' |
Every row is that model year's own factory record. The all-years overview for this floorplan, with the family history and the full line, is on the Jayco Eagle 319MLOK parent page.
No published field moved
Jayco's published record for the 2021 319MLOK matches the adjacent year field for field.
Two factory documents disagree for this model year
Jayco published this floorplan for 2021 in more than one brochure, and those documents do not agree on 4 fields: Dry Hitch Weight (lbs) — the Eagle brochure publishes 2,023, the Eagle Fifth Wheels brochure publishes 2,060; Exterior Width — the Eagle brochure publishes 8' 1", the Eagle Fifth Wheels brochure publishes 8' 0"; Gray Water Capacity (gals) — the Eagle brochure publishes 87, the Eagle Fifth Wheels brochure publishes 87*; Unloaded Vehicle Weight (lbs) — the Eagle brochure publishes 11,170, the Eagle Fifth Wheels brochure publishes 10,940. Neither figure is chosen here and neither is adjusted, so they are left out of the specification table above rather than printed with a winner picked for it. Every other figure on this page is one both documents state identically. If you are working to a tow limit, treat a disputed figure as unknown and weigh the trailer.
Where these numbers come from
Every figure on this page is read from Jayco's own 2021 factory brochure for the 319MLOK — one source, one model year, no blending. The all-years parent page additionally holds a figure from a second publisher for some fields and publishes both where they disagree, without picking a winner. If the two pages differ on a weight, that is the disclosure working, not an error.
Fields Jayco does not publish for 2021
For this model year the factory record omits: Exterior Width, Exterior Width (with slides out), Exterior Height, Unloaded Vehicle Weight (lbs), Dry Hitch Weight (lbs), Tire Size, Gray Water Capacity (gals), Propane Unit (lbs), Propane Unit (lbs) (Optional), Water Heater, Furnace BTU, Furnace, Auto-ignition (BTU output), # of outside storage compartments. Those rows read “Not published” on this page. They are deliberately not filled in from an adjacent model year — a neighbouring year's figure is an inference about this one, not a measurement of it.
04 Buying a 2021 319MLOK at 5 model years old
Tyres are almost certainly past their service age
At 5 years old, the original the factory tire size will be well beyond the five-to-seven-year age window RV tyres are normally replaced on, regardless of tread depth. Budget for a full set plus the spare unless there is a dated receipt.
Water is what kills these, and it is the cheapest thing to check
Press the walls and floor around the entry, the slide openings, the rear wall and under the front cap. Soft spots, a wavy or rippled sidewall, or a stained ceiling are delamination and water ingress, and they are structural rather than cosmetic.
Appliance and component life
Absorption fridges, water heaters and A/C units commonly need attention somewhere in the second decade. Run every appliance on both gas and mains before agreeing a price.
Weigh it before you tow it
Every weight on this page is a DRY factory figure for the 2021 model year. A used coach carries its previous owner's additions, and a fifth wheel puts roughly 15-25% of the load through the truck's rear axle. Weigh the loaded rig at a public scale and check it against the truck's payload, rear-axle and hitch ratings.
05 How it compares — and to its other years
The same floorplan one model year later, with its own published weights.
The parent page for this floorplan: every model year we hold, side by side.
06 Loading it for a trip
Fresh water is the single biggest line in this floorplan’s load plan. A full 81-gallon tank is about 33% of the 2,055-pound cargo capacity — enough that whether you tow with water aboard is a real decision on the 319MLOK rather than a detail.
| Weight budget | Figure | What it means |
|---|---|---|
| Cargo capacity as published (CCC) | 2,055 lb | Everything you add: gear, water, propane, batteries, food, people’s belongings. |
| Fresh tank filled (81 gal × 8.34 lb) | −676 lb | Water is the heaviest thing most owners add, and it is added first. |
| Cargo budget left with a full fresh tank | 1,379 lb | 33% of this plan’s capacity is spent before a single bag is loaded. |
| Per sleeping position, water aboard | 345 lb | A rough share of what is left across the 4 berths this plan sleeps. |
No dry pin weight is published for this floorplan by any source this catalog accepts, so the hitch-share arithmetic is not shown here and the tow block on this page omits it. The figure exists on the trailer’s own weight sticker; a scale ticket taken with the trailer hitched is the reliable way to get it, and it is worth having before you buy rather than after.
07 Where this floorplan sits
| Comparable fifth wheels | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| 319MLOK | 12,995 | — | 4 | 36 ft 7 in |
| Cougar 316RLS | 12,900 | 10,792 | 6 | 35 ft 8 in |
| Wildcat 32LIVE | 13,500 | 10,363 | 4 | 36 ft 5 in |
| Sabre 32GKS | 13,508 | 10,658 | 4 | 34 ft 6 in |
| Cardinal 32CHILL | 12,188 | 9,688 | — | 35 ft 3 in |
| Arctic Wolf 3250SUITE | 12,040 | 9,668 | 4 | 36 ft 1 in |
| Avenue 32RLS | 13,995 | 10,500 | 4 | 34 ft 11 in |
Against the 319MLOK: the Cougar 316RLS is 95 lb lighter and sleeps 2 more; the Wildcat 32LIVE is 505 lb heavier; the Sabre 32GKS is 513 lb heavier and 2 ft shorter. Those are differences in the published numbers only — what they cost, how they are built and how they live are separate questions each of those pages answers on its own terms.
Those are the nearest fifth wheels from other lines by weight — one per line, picked by proximity on that figure and nothing else. They are listed so the same tow vehicle can be checked against real alternatives, not because they are equivalent inside; layout, build and price diverge sharply across that group.
For scale, the Eagle floorplans profiled here run 6,560 to 12,830 pounds dry and 28 to 43 feet of exterior length across 37 plans. Where a floorplan falls in that spread usually says more about which vehicle can tow it, and which site it fits, than the layout name does.
Every profiled floorplan in this line, with the full weight table, is on the Eagle line hub.
08 Common questions about the 319MLOK
How much can the 319MLOK carry?
Cargo carrying capacity is 2,055 pounds. That is the whole budget: water, propane, batteries, gear and everything you bring. Filling the 81-gallon fresh tank uses about 676 pounds of that.
What size tow vehicle does the 319MLOK need?
Your vehicle needs a tow rating of at least 12,995 pounds — this floorplan’s GVWR — and enough payload left over for the hitch load, passengers and anything in the bed. This site does not publish tow ratings for specific vehicles, because one truck model varies by thousands of pounds across engine, axle ratio, cab and package. The figure that governs is the payload sticker on your own door jamb.
How many people does the 319MLOK sleep?
It is rated to sleep 4. Rated sleeping positions include convertible furniture, so count the beds against how you actually travel rather than against the number.
What are the tank capacities on the 319MLOK?
Fresh 81 gallons, black 50 gallons. Tank sizes set how long the floorplan can sit away from hookups, and the smallest of the three is what ends the stay.
How long is the 319MLOK?
Exterior length is 36' 7". Measure against your site length and your storage before committing — the exterior figure is the one that has to fit, and it includes the tongue or pin box.
Every figure in these answers is read from this page’s verified specification table. Where the manufacturer publishes nothing, the question is not answered rather than estimated.
09 What this page publishes, and what it does not
This catalog tracks 18 specification fields per floorplan. Named sources publish 7 of them for the 319MLOK. The rest are not shown, because the alternative is reading a figure across from a sibling floorplan or from what the segment usually does — and a number nobody published is worth less than an admitted gap.
Not published for this floorplan: dry weight, dry hitch weight, exterior height, exterior width, grey tank, slide count, axle count, tire specification, awning, refrigerator, air conditioning. If you find one of these in a manufacturer document for this plan, it belongs on this page.
The completeness figure at the foot of this page (38%) measures the same thing on the full field set: it is a measurement of how much this floorplan’s manufacturer publishes, not of how much research went into the page.
How every figure here was sourced and checked is set out on the methodology page.
11 NHTSA safety record
This floorplan belongs to the Eagle line, and NHTSA holds 44 recall campaigns and 114 owner complaints against that line. They are separate records and are not added together — a recall is a manufacturer-confirmed defect with a remedy; a complaint is one owner’s account, which NHTSA does not verify.
What to look at on a used one. Across the 114 complaints filed on this line the most-reported components are tires (23%), structure (18%) and equipment (13%). That is where owners of this family have had trouble, so it is where an inspection is worth the time.
Recall coverage is not complete — our harvest of NHTSA’s recall API ran 1,556 queries, of which 0 failed and 242 returned an explicit zero. A line can still be under-reported where NHTSA files a roster under a parent name, or where a match rests on the wording of the recall rather than its model field. Complaints come from the complete bulk file but are unverified and self-selected: a high count tracks how many units a line sold at least as much as how well it was built. Check a specific VIN at NHTSA before you buy. Full tables are on the Eagle line page.