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Condition: Used
Sleeps: 4
Number of Slide Outs: 3
Gross Vehicle Weight: 16,800 lb
Number of Axles: Tandem
Exterior Height: 13 ft 4 in
Description: ****STK#: CW19254A.****
3813MS
The Keystone Montana 3813MS is a luxury, trip...
Updated: Wednesday, September 30, 2026 12:42 PM
Seller: RV World Yuma
Condition: Used
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Number of Axles: Tandem
Exterior Height: 13 ft 4 in
Description: Used 2022 Keystone RV Montana 3813MS
Details: Keystone Montana fifth wheel 3813MS highlights: Front Master Suite Kitchen Island Rear Living Area ...
Updated: Friday, October 09, 2026 07:30 PM
Seller: Bankston Motor Homes of Hunstville
Condition: Used
Exterior Length: 38 ft
Sleeps: 4
Number of Slide Outs: 3
Number of Axles: Tandem
Exterior Height: 13 ft 4 in
Description: 2021 KEYSTONE MONTANA 3813 MS
Stock No. 5253T
$54,950.00
CALL/TEXT THOMAS MAY !!
JUST ARRIVED ON TRADE!!
VERY CLEAN INSIDE AND OUT!!
EVERY...
Updated: Thursday, September 03, 2026 05:43 PM
Seller: Findlay Truck & RV
Used 2021 KEYSTONE RV CO MONTANA 3813MS
Dover, Florida
MSRP$66,993 USD $47,993
View Floor Plan
Condition: Used
Exterior Length: 41 ft
Sleeps: 4
Number of Slide Outs: 3
Exterior Height: 13 ft 4 in
Fresh Water Tank Capacity: 66 gal
Description: USED 2021 KEYSTONE MONTANA 3813MS – 356614
**Keystone Montana fifth wheel 3813MS highlights:**
- Hide-A-Bed Sofa
- Residential Refrigera...
Updated: Thursday, October 08, 2026 03:32 AM
Seller: General RV Center - Dover
Condition: Used
Exterior Length: 40 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Number of Axles: Tandem
Exterior Height: 13 ft 4 in
Description: The 2021 Keystone Montana Series M 3813MS offers an exceptional living experience with a spacious layout that sleeps four comfortably. With a dry w...
Updated: Monday, October 12, 2026 09:53 AM
Seller: Southland RV LaGrange
Condition: Used
Exterior Length: 41 ft 9 in
Sleeps: 4
Number of Slide Outs: 3
Number of Axles: Tandem
Exterior Height: 13 ft 4 in
Description: Used 2021 Keystone RV Montana 3813MS
Details: ***COMING SOON*** Call for pricing: Keystone Montana fifth wheel 3813MS highlights: Hide-A-B...
Updated: Monday, October 12, 2026 09:53 AM
Seller: Southland RV LaGrange
Condition: Used
Exterior Length: 40 ft 9 in
Exterior Height: 13 ft 4 in
Fresh Water Tank Capacity: 66 gal
Stock Number: 41870A
Exterior Width: 8 in
Description: Overview Welcome Aboard the 2021 Keystone Montana 3813MS: Redefining Travel with Every Mile! The 2021 Keystone Montana 3813MS is not just an RV; it...
Updated: Tuesday, October 13, 2026 03:38 PM
Seller: RV Country - Mesa, AZ
Condition: Used
Exterior Length: 40 ft
Sleeps: 4
Number of Slide Outs: 3
Stock Number: 7695
Air Conditioning: Yes
Description: Front Bedroom - Front Bathroom: 3 Slides, Air, Awning, Slide Toppers, Back Ladder, 2 TV'S, Fireplace, Sofa/Bed, Theater Seating, Refrigerator, Mic...
Updated: Monday, August 17, 2026 11:13 AM
Seller: Town & Country RV Center Inc.
