01 What makes it unique
KZ lists the 2024 Sportsmen Fifth Wheel 303MB at 8,720 lb dry, a GVWR of 10,000 lb, a net carrying capacity of 1,280 lb and a pin weight of 1,590 lb. Its dry weight plus its carrying capacity comes to exactly its GVWR.
It is 34' 2" long and 12' 5" high. KZ prints its tanks as 45 gal fresh, 82 gal grey, 50 gal black.
Among the 6 Sportsmen Fifth Wheel floorplans KZ’s 2024 Sportsmen destination trailers & fifth wheels brochure lists with a published dry weight, it is number 4 from the lightest, in a range from 6,340 lb (Sportsmen Fifth Wheel 231RK) to 9,030 lb (Sportsmen Fifth Wheel 302BHK). Every figure in that comparison is KZ’s, for the same model year.
Every number on this page was read on 6 Nov 2026 from KZ’s 2024 Sportsmen destination trailers & fifth wheels brochure, the maker’s own dated document for model year 2024.
How the 303MB differs from the other five Sportsmen Fifth Wheel floorplans. Most distinctive first. How these ranks are worked out.
- Pin weight, 1,590 lb: second-heaviest of six, between the 302BHK (1,580 lb) and the 292BHK (1,650 lb).
- Dry weight, 8,720 lb: third-heaviest of six, between the 292BHK (8,390 lb) and the 303RL (8,750 lb).
- Cargo capacity, 1,280 lb: third-largest of six, between the 303RL (1,250 lb) and the 251RL (1,330 lb).
- Cargo capacity as a share of GVWR, 12.8%: third-smallest of six, between the 303RL (12.5%) and the 231RK (15.5%).
- Pin weight as a share of dry weight, 18.2%: third-largest of six, between the 302BHK and 303RL (17.5%) and the 251RL (18.4%).
- Sleeping capacity, 7: third-largest of six, between the 231RK, 251RL and 303RL (5) and the 292BHK (9).
- Grey tank, 82 gal: largest of six, level with the 231RK; next are the 251RL, 292BHK and 303RL (50 gal).
- Length, 34 ft 2 in: shared with the 303RL; of six, two shorter and two longer, nearest the 251RL (29 ft 4 in) and the 292BHK (34 ft 10 in).
Next to the 292BHK, the nearest lighter floorplan by dry weight, the 303MB is 330 lb heavier by dry weight, has 330 lb less cargo capacity, has a pin weight 60 lb lighter, is 8 in shorter, has a grey tank 32 gal larger and sleeps two fewer; the two publish the same GVWR, exterior height, interior height, fresh tank and black tank.
Next to the 303RL, the nearest heavier floorplan by dry weight, the 303MB is 30 lb lighter by dry weight, has 30 lb more cargo capacity, has a pin weight 60 lb heavier, has a grey tank 32 gal larger and sleeps two more; the two publish the same GVWR, length, exterior height, interior height, fresh tank and black tank.
02 Full specifications
Dimensions
- Exterior length
- 34' 2"
- Exterior height
- 12' 5"
- Exterior width
- 96"
- Interior height
- 75"
Weights
- Dry / unit base weight (UVW)
- 8,720 lb
- GVWR (max loaded)
- 10,000 lb
- Net cargo / payload (CCC)
- 1,280 lb
- Hitch / pin weight
- 1,590 lb
Capacities
- Fresh water
- 45 gal
- Grey water
- 82 gal
- Black water
- 50 gal
Running gear
- Hitch type
- Fifth wheel (pin box)
- Tire size
- 16"
Sleeping & layout
- Sleeps
- 7
- Dry Axle Weight*
- 7,130
- Refrigerator (cu. feet)
- 8
- Water Heater Cap. (on-demand tankless)
- ***
- 1/2 Bath Cap. (gal.)
- N/A
- LP Gas Cap. (lbs.)
- 60
- Furnace BTUs (1,000s)
- 30
- Model year source
- Brochure prints "2024 SPORTSMEN DESTINATION TRAILERS & FIFTH WHEELS"; KZ files it under 2024 (kz-rv.com/brochures/2024/). The spec table heads these six "FIFTH WHEELS".
- Weight basis (as printed)
- *This weight reflects the rolling average unit weight for each model. Your trailer weight will vary according to optional equipment.
- Length basis (as printed)
- **For travel trailers, exterior length is measured from rear of bumper to leading edge of coupler.
- Awning
- 13'/11' opt.
How these published figures sit against the rest of the catalogue: fifth wheel pin weight and payload; fresh, grey and black tank sizes; camper trailer size chart.
Drawn to scale
Weight budget
Size, with end view
Holding tanks
Axles, wheels and nose shape are schematic; not a floorplan. Data: dataset.
Towing it
Check your vehicle. Enter the ratings from your owner’s manual and the door-pillar placard.
Compares your figures with this page’s published GVWR (10,000 lb) and the upper loaded pin estimate (2,500 lb, a rule of thumb). Your vehicle’s placard and the trailer’s own weight label govern.
Loaded range: 15–25% of GVWR on the pin, a rule of thumb, not a measurement of this unit. No truck ratings or hitch classes (why; NHTSA, DOT HS 809 433). The range starts at the published figure, because loaded is never lighter than that.
03 The Sportsmen Fifth Wheel floorplan family
KZ’s 2024 Sportsmen destination trailers & fifth wheels brochure lists 6 Sportsmen Fifth Wheel floorplans; every one with a printed weight has a page here.
| Floorplan | Nominal | Sleeps | Notable |
|---|---|---|---|
| Sportsmen Fifth Wheel 231RK | 24' 10" | 5 | Profiled |
| Sportsmen Fifth Wheel 251RL | 29' 4" | 5 | Profiled |
| Sportsmen Fifth Wheel 292BHK | 34' 10" | 9 | Profiled |
| Sportsmen Fifth Wheel 303MB | 34' 2" | 7 | Profiled |
| Sportsmen Fifth Wheel 303RL | 34' 2" | 5 | Profiled |
| Sportsmen Fifth Wheel 302BHK | 35' 9" | 10 | Profiled |
KZ’s 2024 Sportsmen destination trailers & fifth wheels brochure lists 6 Sportsmen Fifth Wheel floorplans. Every one with a printed weight has a page here.
04 Notes on this floorplan
What KZ does not publish for the Sportsmen Fifth Wheel 303MB
Nothing is filled from a sibling model, a different model year or a dealer listing.
Read the label on the trailer
Federal rules put a load-carrying label inside every RV trailer: its unloaded weight with full propane, its cargo carrying capacity and its GVWR (49 CFR 571.110 and 571.120). Those figures come from the trailer itself and govern the towing decision.
05 How it compares
8,390 lb dry and 10,000 lb GVWR, against this model’s 8,720 lb and 10,000 lb.
8,750 lb dry and 10,000 lb GVWR, against this model’s 8,720 lb and 10,000 lb.
06 Loading it for a trip
A full 45-gallon fresh tank is about 374 lb of water (water counts as cargo: 49 CFR 571.110 S9.3.2), 29% of the Sportsmen Fifth Wheel 303MB’s 1,280 lb cargo capacity, leaving 906 lb (130 lb per rated berth). Across 6 Sportsmen Fifth Wheel floorplans the water share runs 23% to 39%, and 3 give up more than this one. Nearest on that share: Sportsmen Fifth Wheel 251RL at 28% and Sportsmen Fifth Wheel 303RL at 30%. Your own unit’s figure is on the label inside its entry door (49 CFR 571.110 S9.3.3).
07 Where this floorplan sits
Closest sibling: the Sportsmen Fifth Wheel 303RL, nearest on the published figures. It differs on 5 of the 9 fields both publish (this plan first): sleeps 7 vs 5; dry weight 8,720 lb vs 8,750 lb; cargo capacity 1,280 lb vs 1,250 lb; hitch weight 1,590 lb vs 1,530 lb; grey tank 82 gal vs 50 gal. They match on length, GVWR, fresh tank and black tank.
| Sportsmen Fifth Wheel plans | This plan | Position, low to high | Range |
|---|---|---|---|
| GVWR (lb) | 10,000 | 3–6 of 6 | 7,500–10,000 |
| Dry weight (lb) | 8,720 | 4 of 6 | 6,340–9,030 |
| Cargo capacity (lb) | 1,280 | 4 of 6 | 970–1,610 |
| Hitch weight (lb) | 1,590 | 5 of 6 | 1,010–1,650 |
| Length | 34 ft 2 in | 3–4 of 6 | 24 ft 10 in–35 ft 9 in |
| Grey tank (gal) | 82 | 5–6 of 6 | 32–82 |
| Black tank (gal) | 50 | 1–5 of 6 | 50–64 |
| Sleeps | 7 | 4 of 6 | 5–10 |
Either side of it by GVWR: Sportsmen Fifth Wheel 302BHK matches it at 10,000 lb GVWR; Sportsmen Fifth Wheel 303RL matches it at 10,000 lb GVWR.
| Nearest Sportsmen Fifth Wheel siblings | Length | Sleeps | Dry (lb) | GVWR (lb) | CCC (lb) | Hitch (lb) | Fresh (gal) |
|---|---|---|---|---|---|---|---|
| Sportsmen Fifth Wheel 303MB | 34 ft 2 in | 7 | 8,720 | 10,000 | 1,280 | 1,590 | 45 |
| Sportsmen Fifth Wheel 303RL | 34 ft 2 in | 5 | 8,750 | 10,000 | 1,250 | 1,530 | 45 |
| Sportsmen Fifth Wheel 292BHK | 34 ft 10 in | 9 | 8,390 | 10,000 | 1,610 | 1,650 | 45 |
| Sportsmen Fifth Wheel 251RL | 29 ft 4 in | 5 | 7,170 | 8,500 | 1,330 | 1,320 | 45 |
| Sportsmen Fifth Wheel 302BHK | 35 ft 9 in | 10 | 9,030 | 10,000 | 970 | 1,580 | 45 |
| Sportsmen Fifth Wheel 231RK | 24 ft 10 in | 5 | 6,340 | 7,500 | 1,160 | 1,010 | 45 |
All 6 Sportsmen Fifth Wheel floorplans: Sportsmen Fifth Wheel line hub.
| Other lines, nearest by GVWR | GVWR (lb) | Dry (lb) | Sleeps | Length |
|---|---|---|---|---|
| Sportsmen Fifth Wheel 303MB | 10,000 | 8,720 | 7 | 34 ft 2 in |
| Durango 1500 D250RKS | 10,000 | 7,620 | — | 30 ft 2 in |
| Jag 25JFS | 10,000 | 6,230 | — | 26 ft 0 in |
| Arctic Wolf 27SGS | 9,995 | 7,893 | — | 29 ft 11 in |
| Eagle 25.5REOK | 9,995 | 7,775 | 6 | 28 ft 8 in |
| Roamer Light Duty 28DBSS | 9,995 | 8,525 | 10 | 34 ft 6 in |
| Sundance Fifth Wheel 28DB | 9,995 | 8,605 | 10 | 34 ft 7 in |
Against the Sportsmen Fifth Wheel 303MB: the Durango 1500 D250RKS is 4 ft shorter; the Jag 25JFS is 8 ft shorter; the Arctic Wolf 27SGS is 5 lb lighter and 4 ft shorter.
08 Common questions about the Sportsmen Fifth Wheel 303MB
How much does the Sportsmen Fifth Wheel 303MB weigh?
8,720 lb dry; 10,000 lb GVWR, the most it may weigh loaded.
How much can the Sportsmen Fifth Wheel 303MB carry?
1,280 lb, 13% of its GVWR (median across 442 fifth wheels here: 19%). A full fresh tank uses 374 lb of it.
What is the pin weight of the Sportsmen Fifth Wheel 303MB?
1,590 lb as published, 18% of the dry weight (median across 686 fifth wheels here: 19%).
What size tow vehicle does the Sportsmen Fifth Wheel 303MB need?
A tow rating of at least 10,000 lb, plus payload for the loaded pin weight, passengers and cargo.
How many people does the Sportsmen Fifth Wheel 303MB sleep?
It is rated to sleep 7. 2 of the 6 Sportsmen Fifth Wheel floorplans that publish a count sleep more.
What are the tank capacities on the Sportsmen Fifth Wheel 303MB?
Fresh 45, grey 82, black 50 gallons. Off hookups, fresh water runs out first.
How long is the Sportsmen Fifth Wheel 303MB?
34' 2" overall, tongue or pin box included.
From the figures above.
09 What this page publishes, and what it does not
13 of the 18 fields this catalogue tracks are published for the Sportsmen Fifth Wheel 303MB. Not published: slide count, axle count, refrigerator, air conditioning, tire size (a description is published, a size is not).
Sourcing rules: methodology.
10 Manuals & documents
Sources: kz-rv.com (linked below); the full source note is at the foot of the page.
11 NHTSA safety record
NHTSA holds 1 recall campaign against the Sportsmen Fifth Wheel line (a recall and a complaint are not the same thing).
Recall coverage here is not complete, and complaints are owners’ unverified reports (how this record is built). Check a specific VIN at NHTSA before you buy. Full tables are on the Sportsmen Fifth Wheel line page.