Detailed floor plan showing the complete layout and dimensions
Floorplan
Complete Fifth Wheel Specifications
2021 Keystone Montana Series M Overview
The 2021 Keystone Montana Series M 3813MS offers an exceptional living experience with a spacious layout that sleeps four comfortably. With a dry weight of 14,119 lbs and a length of 41 ft, this used fifth wheel is perfect for family adventures or weekend getaways. Enjoy modern amenities like the seamless 48" x 30" fiberglass shower and theater seating for ultimate relaxation. This model also features a solar-equipped design, enhancing your off-grid capabilities. Experience the renowned Montana quality and comfort on your next trip. Explore this versatile fifth wheel today and see it in LaGrange, GA!
Premium Features & Highlights
Spacious Interior Layout
3 Slide-Outs for Increased Living Space
Gas/Electric Refrigerator for Versatile Food Storage
Theater Seating for Comfortable Entertainment
Solar Equipped for Off-Grid Capability
Select a category to view specs
Overview
Vehicle Identification & Details
8 specifications available
Category
Fifth Wheel
Condition
used
Floorplan
3813MS
Make
Keystone
Model
Montana Series M
Stock Number
LAG8022X
VIN
4YDF38128M4701882
Year
2021
Size & Weight
Dimensions, Weight, Construction & Exterior
8 specifications available
Dry Weight
14,119 lbs
GVWR
16,600 lbs
Length
40.75 ft
Width
8 ft
Awnings Count
2
Doors Count
1
Exterior Speakers
Yes
Slides
3
Sleeping & Layout
Beds, Layout, Living & Comfort
8 specifications available
Bedroom Count
1
Bunk Beds Count
0
Private Bedroom
Yes
Queen Beds Count
1
Sleeps
4
Central Vacuum
Indoor/outdoor central vacuum
Fireplace
48" LED fireplace
Theater Seating
Yes
Kitchen & Dining
Cooking, Dining & Appliances
2 specifications available
Oven
Yes
Refrigerator Type
Gas/Electric
Bathroom & Facilities
Comfort & Privacy
3 specifications available
Bathrooms Count
1
Shower Type
Seamless 48" x 30" fiberglass shower
Toilet Type
Dometic 310 ceramic toilet with Powerflush technology
Water Systems
Tanks & Plumbing
6 specifications available
Black Water Capacity
49 gal
Fresh Water Capacity
66 gal
Gray Water Capacity
88
Water Heater Capacity Gallons
12 gal
Water Heater Power Mode
Dual mode
Water Heater Type
Gas/electric
Power & Electrical
Electrical, Entertainment & Safety
2 specifications available
Solar Equipped
Yes
Televisions Count
2
Climate Control
Heating & Cooling
4 specifications available
Ac Btu
15,000 BTU
Air Conditioning
30000 BTU
Heater Btu
35,000 BTU
Heater Type
Forced air
Standard Features & Equipment
Max Turn Technology" front cap and radius frame
Hitch Vision" mirror
Residential bedspread and pillows
3 Square Ombre Black headboard
Modern Maple cabinetry w/ hand wiped glazing, Soft-close hidden cabinet hinges, Hardwood cabinet framing, Modern Maple hardwood kitchen island panels w/ backlit double diamond glass inserts, Modern subway backsplash, 35" x 12" or 48" x 12" kitchen window behind cook top, MJ Finishing wall-mounted, free standing dinette w/ flip leaf, Two (2) fixed and two (2) folding dinette chairs, Chair Buddy" to secure dinette chairs, Pop-up electrical and USB outlets tower in free standing dinette buffet cabinet, Soft-close full extension drawer guides, Pull out kitchen trash can, Solid surface kitchen countertops, Solid surface flush-mount sink covers, Sink cover storage below kitchen sink, Motion sensor LED lighting below kitchen sink, LED accent lighting below kitchen countertops, Motion sensor LED light in pantry, Deep 60/40 stainless steel sink, High-rise faucet with integrated pull out sprayer, 30" over-the-range convection/microwave oven, Suburban® Elite Series 22" gas cook top and oven w/ bi-fold glass cover, Central vacuum w/ interior and exterior ports plus toe-kick sweep, Power vent fan w/ rain sensor,
Sandstone natural molded bathroom vanity top w/ stainless steel sink, Dometic 310 ceramic toilet with Powerflush technology, Sliding bathroom door, Skylight over shower, 12-gallon DSI gas/electric water heater, Three (3) Drawers one (1) door vanity, Brushed nickel shower head and faucet, Seamless 48" x 30" fiberglass shower, 50 Amp service, 75 Amp converter w/ Charge Wizard technology and battery selector: lead acid / lithium, Power vent fan w/ rain sensor, Motion sensor LED lighting in linen storage cabinet,
KeyShield" automotive-grade paint on front cap, High-gloss gel coated sidewalls and rear wall, Automotive frameless safety glass windows, LPG quick-connect for accessories, Extra large fold away entry handle, Rear roof ladder, Roof mounted solar prep (wired for 5 interior inverted outlets), Slam latch pass-through storage compartment doors, Extra large (30" wide by 78" tall) entry door w/ friction hinge, Entry door w/ Screen Shot" and Screen Defender", Drop-frame pass-through storage compartment, MORryde® Step Above" entry steps w/ strut assist, Motion sensor LED lights in pass-through storage compartment, LED safety light package: entry step, gooseneck, upper slide-outs, and sewer termination, LED off door side scare light,
Dometic 12V electric patio awning w/ LED lights and Power Channel, Second 12V electric patio awning w/ LED lights and Power Channel (select models), Heated central exterior water and convenience center: (outside shower w/ quick-connect hose, black tank flush, easy winterization kit, water heater bypass, power tank fill, enclosed low point drains, battery disconnect, KeyTV" hook-ups, 12V motion sensor light),
35,000 BTU Furnace, Coleman Mach* power saver 15,000 BTU Whisper Quiet main air conditioner system, bedroom, Coleman Mach* power saver 15,000 BTU Whisper Quiet main air conditioner system, living room, Wired and framed for 3rd air conditioner, 16,500 BTU heat pump on main air conditioner, Tested and approved for 0° usage, Two attic vents for cross-ventilation, Insulated and heated holding tanks and dump valves, Insulated in-floor water lines, Enclosed and heated low point drains, 12V electric tank heaters, 12V ceiling fan w/ wall controls, 48" LED fireplace,
Thomas Payne Collection theater seating w/ electric recliners, massage, and seat warmers, Thomas Payne Collection® tri-fold hide-a-bed sofa(s), Backlit crown molding, Craftsman style slide-out fascia, Handcrafted window valance center blocks, Midnight roller shades with reflective back side and solar screen day shades, Beauflor Heartwood resilient vinyl flooring, Syntec" Jubilation woven PVC flooring, Brushed nickel heat vents, LED dimmer switches in select areas, Flush-mounted LED interior Lights, LED motion sensor light at steps,
Unified wiring standard: each wire color-coded and numbered, 5" arched roof rafters, Welded aluminum framed walls and floors, CNC routed, laminated sidewalls w/ dual layered lauan and metal backing strips to anchor interior cabinets, Seamless 5/8" thick floor decking, Powder coated 12" steel l-beam frame, Seamless roto-cast holding tanks, Double-insulated laminated rear wall,
Jensen DVD/CD/MP3 entertainment system w/ Bluetooth®, Marine-grade exterior speakers, Patented KeyTV satellite prep, Winegard Air 360+ Amplified omni-directional antenna, roof satellite connection, and 4G LTE / Wi-Fi prep, Jensen 50" HD LED TV in living area, Jensen 32" HD LED TV in bedroom,
* Vehicle specifications listed to the best of our knowledge. All specifications, features, and information are provided by the manufacturer. Southland RV is not responsible for manufacturer defects, specification changes, or recalls. Buyers should verify all information directly with Southland RV.
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SOLD AS-IS
This unit is sold "as-is" by Southland RV with no warranties express or implied. The buyer is responsible for inspection and accepts the unit in its current condition. Southland RV makes no representations about condition, mechanical status, or fitness for any particular purpose. See Southland RV for complete details.
ScoutRV Platform is a technology provider only and makes no representations about unit condition or sales. All sales and warranties are between buyer and Southland RV.
Built to Last
Superior construction for years of adventures
Plumbing
66-Gallon Fresh Water Tank
Ample fresh water capacity for extended trips without frequent refills.
HVAC
30,000 BTU Air Conditioning
Stay cool in warmer climates with powerful air conditioning.
Ready for Your Next Adventure?
Experience the freedom of the open road with your next RV adventure
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Estimated • 20% down
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Showroom Hours
Mon: Closed, Tue-Sat: 9 AM - 5 PM, Sun: Closed
1327 Lafayette Pkwy LaGrange, GA 30241
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Manufacturer and/or stock photographs may be used and may not be representative of the particular unit being viewed. We are not responsible for any misprints, typos, or errors found in our website pages. Any price listed excludes sales tax, registration tags, and delivery fees. Manufacturer pictures, specifications, and features may be used in place of actual units on our lot. Please contact us for availability as our inventory changes rapidly. All calculated payments are an estimate only and do not constitute a commitment that financing or a specific interest rate or term is available.
$0
USEDFifth WheelLaGrange, GAStock #LAG8022X
2021 Keystone Montana Series M 3813MS
Length
40.75ft Length40.75ft40.75ft
Sleeps
Sleeps 444
Dry Weight
14,119lbs Dry Weight14,119lbs14,119lbs
$XX,XXX
AI Assistant
Ask me anything about this unit
Online
Quick questions about this 2021 Keystone Montana Series M:
* AI-generated responses are for informational purposes only and may contain errors. Please verify all information with Southland RV before making purchasing decisions.
USEDFifth WheelLaGrange, GAStock #LAG8022X
2021 Keystone Montana Series M 3813MS
Length
40.75ft Length40.75ft40.75ft
Sleeps
Sleeps 444
Dry Weight
14,119lbs Dry Weight14,119lbs14,119lbs
$XX,XXX
AI Assistant
Ask me anything about this unit
Online
Quick questions about this 2021 Keystone Montana Series M:
* AI-generated responses are for informational purposes only and may contain errors. Please verify all information with Southland RV before making purchasing decisions.
USEDFifth WheelLaGrange, GAStock #LAG8022X
2021 Keystone Montana Series M 3813MS
Length
40.75ft Length40.75ft40.75ft
Sleeps
Sleeps 444
Dry Weight
14,119lbs Dry Weight14,119lbs14,119lbs
$XX,XXX
AI Assistant
Ask me anything about this unit
Online
Quick questions about this 2021 Keystone Montana Series M:
* AI-generated responses are for informational purposes only and may contain errors. Please verify all information with Southland RV before making purchasing decisions.