# 2021 Keystone Montana Series M 3813MS

Used 2021 Keystone Montana Series M 3813MS for sale at Southland RV in LaGrange, GA.

## Summary

- Condition: Used
- Status: On order
- Year: 2021
- Make: Keystone
- Model: Montana Series M
- Floorplan: 3813MS
- Type: Fifth Wheel
- VIN: 4YDF38128M4701882
- Stock number: LAG8022X

## Price

- Price: $82,644

### Transparent Pricing. 

The Price You See is the Price You Get.

- Unit Price: $81,945
- Title and Document Fee: $699
- Pre Delivery Inspection: Included in Price
- Interior and Exterior Detail: Included in Price
- Propane Filled: Included in Price
- Battery Installed: Included in Price
- Customer Walkthrough and Training: Included in Price
- Safety Inspection: Included in Price
- **Total: $82,644**

This is the same breakdown shown on the listing page. Sales tax and anything not listed above are extra; confirm the final price with the dealership.

## Specifications

- Length: 40' 9"
- Width: 8'
- Sleeps: 4
- Slide-outs: 3
- Dry weight: 14,119 lbs
- GVWR: 16,600 lbs
- Hitch weight: 2,820 lbs
- Payload capacity: 2,481 lbs
- Fresh water: 66 gal
- Gray water: 88 gal
- Black water: 49 gal
- Axles: 2
- Air conditioning: 15,000 BTU

## 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

## Description

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!

## Questions

### How much is this 2021 Keystone Montana Series M 3813MS?
Southland RV lists it at $82,644. The listing itemizes every fee. Total: $82,644. Sales tax and anything not listed are extra. Confirm the final price with the dealership.

### Is it new or used?
Used.

### Where is it?
At Southland RV - LaGrange, 1327 Lafayette Pkwy, LaGrange, GA, 30241.

### How many people does it sleep?
Up to 4.

### How long is it?
40' 9" overall.

### What do I need to tow it?
This fifth wheel has a dry weight 14,119 lbs, GVWR 16,600 lbs, hitch weight 2,820 lbs. Choose a tow vehicle rated above the GVWR, and check its hitch and payload ratings too. Southland RV can confirm a match for your vehicle.

### What are the tank sizes?
66 gal fresh, 88 gal gray, 49 gal black.

### Can I finance it or trade in my current unit?
Yes. Southland RV offers financing and takes trade-ins. Apply or get a trade value on the website, or call 706-717-4142.

### How do I check it is still available?
Inventory changes daily. Use the contact form on the listing page or call 706-717-4142 to confirm before visiting.

## Dealer

- Southland RV - LaGrange
- Address: 1327 Lafayette Pkwy, LaGrange, GA, 30241
- Phone: 706-717-4142

## Links

- Listing page (canonical): https://www.southlandrv.com/inventory/used/fifth-wheel-2021-keystone-montana-legacy-series-lag8022x
- Ask about this unit: use the contact form on the listing page, or call 706-717-4142
- Financing: https://www.southlandrv.com/financing
- Trade-in value: https://www.southlandrv.com/trade-in
- All inventory: https://www.southlandrv.com/inventory.md

Last updated: 2026-11-05