2027 Forest River Sandpiper 4003MB vs Keystone Sprinter 3800FLB
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Key differences
Both are 2027 Fifth wheel models. Here's how they differ, from manufacturer specifications.
- The Keystone Sprinter 3800FLB is 3″ longer: 43′ vs 42′ 9″.
- The Keystone Sprinter 3800FLB is 294 lb lighter unloaded: 12,775 vs 13,069 lb.
- The Keystone Sprinter 3800FLB lists 149 lb more cargo capacity: 3,225 vs 3,076 lb.
- The Forest River Sandpiper 4003MB has a 600 lb lighter hitch weight: 2,145 vs 2,745 lb.
- The Keystone Sprinter 3800FLB holds 5 gal more fresh water: 75 vs 70 gal.
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YOUR SHORTLIST
Floorplan
PRICING
Manufacturer price (USD)
Not verified
Not verified
Lowest tracked dealer price (USD)
No recently verified dealer price
No recently verified dealer price
Est. monthly payment (USD)
No verified price to estimate from
No verified price to estimate from
DIMENSIONS & WEIGHTS
Exterior length
42′ 9″
43′ 0″
Exterior width
8′ 5″
—
Exterior height
13′ 5″
13′ 4″
Shipping / unloaded weight
13,069 lb
12,775 lb
GVWR
13,145 lb
—
Listed cargo capacity
3,076 lb
3,225 lb
Listed hitch weight
2,145 lb
2,745 lb
LIVING & SLEEPING
Sleeping capacity
—
6
Slide-outs
4
—
Main bed
Not verified
70" x 80" king bed w/ gas strut storage
Bunk beds
✓ Yes
✓ Yes
Dinette
Not verified
Not verified
Bathroom
Not verified
Not verified
Refrigerator
Not verified
16 Cu. Ft. 12V refrigerator
TANKS & EVERYDAY FEATURES
Fresh water
70 gal
75 gal
Gray water
156 gal
78 gal
Black water
52 gal
78 gal
Awning length
20′ 0″
—
Shore power / electrical service
Not verified
Not verified
Solar equipment
Not verified
SolarFlex™ Ready
Outdoor kitchen
✓ Yes
No
Washer/dryer prep
Not verified
✓ Yes
Microwave
Not verified
✓ Yes
Cooktop
Not verified
Free Standing Residential Gas Range / Oven
Air conditioning
Not verified
(2) Air conditioning units; 3rd. A/C
Electric fireplace
Not verified
✓ Yes
Backup camera
Not verified
Not verified
Propane tanks
—
2
Tire size
Not verified
ST235/80R16G
SOURCES & VERIFICATION
Weight basis
Manufacturer unloaded vehicle weight
Manufacturer shipping weight
Source checked
2026-10-22 Manufacturer ↗
2026-10-22 Manufacturer ↗
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Choose from 2,283 RVs by Forest River, Keystone, Coachmen, Jayco and 19 other manufacturers. Add up to six to see their floorplans and specifications together.
Manufacturer floorplan images © their respective manufacturers. Specs checked October 19, 2026; exact-unit labels and production options may differ. “Not verified” or a dash means we have no confirmed value. “Not listed” means the applicable manufacturer equipment was checked but does not mention the feature; it does not mean “No.” “Conflicting data” means manufacturer entries disagree. “Optional” equipment is available but is not confirmed as standard. Camera prep does not confirm an installed camera. Weights are kept separate: unloaded weight, GVWR, cargo capacity, and hitch weight. Confirm every specification for the exact model year and configuration with the manufacturer. This tool does not establish towing compatibility.
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