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New 2021 Forest River RV Sandpiper C-Class 3660MB

Call us today at 856-629-7400
2021 3660MB Features and Options

Forest River Sandpiper C-Class fifth wheel 3660MB highlights:

  • Mid-Bunkhouse
  • Loft Area
  • Oversized Kitchen Island
  • Booth Dinette
  • Tri-Fold Hide-A-Bed Sofa
  • Outside Mini Refrigerator


Perfect for a couple or family, this fifth wheel offers a private bunkhouse that is centrally located and full of features allowing you to utilize this room as you wish.  From the glider sofa with bunk above, plus the wardrobe and cabinets, you can relax on the furniture and offer extra sleeping to your guests.  The loft area gives you even more space for storage or sleeping.  This kitchen provides everything you will need to feed everyone including an oversized island with pendant lights, a 17 cu. ft. refrigerator, two pantries, and a coffee bar.  There is plenty of seating on the furniture including a booth dinette, plus there is a 50" flat screen TV to watch and a fireplace as well as ceiling fan for whichever temperature you are wanting inside. Next, place your larger items in the pass-through compartment, relax under the "One Touch" electric awning, and make a meal using the bumper mount swivel gas grill. 


With any Forest River Sandpiper C-Class fifth wheel you will receive superior construction that is built to last the long haul!   From the laminated vacuum bonded aluminum sidewalls, the color matched seamless rubber roof, the block foam insulation, and the Underbelly Armor providing full length underbelly protection from decay and erosion. And you will especially appreciate the MORryde entry step as you carry your items inside and outside.  A few more features that will impress include extra-large picture windows throughout, upgraded raised panel cabinet doors and designer rails, a residential kitchen faucet, a stainless steel package, and so much more!  Make your choice today and start enjoying elegance on your next trip!  

What Our Customers Are Saying

Meets our requirements

Like most: Very good condition. Setup team did very well - Paul
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Location: Berlin NJ
Stock# 21449
Interior Color: CAVIAR
2021 3660MB Specifications
Sleeps 9
Slides 4
Length 39 ft 11 in
Ext Width 8 ft
Ext Height 13 ft 4 in
Interior Color CAVIAR
Hitch Weight 2115 lbs
Gross Weight 14115 lbs
Dry Weight 11465 lbs
Cargo Weight 2951 lbs
Fresh Water Capacity 50 gals
Grey Water Capacity 82 gals
Black Water Capacity 52 gals
Tire Size 16"
Furnace BTU 35000 btu
Number Of Bunks 1
Available Beds Queen
Refrigerator Type Stainless Steel
Refrigerator Size 17 cu ft
Cooktop Burners 4
Shower Size 34" x 34"
Number of Awnings 1
LP Tank Capacity 30 lbs
Water Heater Capacity 10 gal
Water Heater Type DSI
AC BTU 15000 btu
TV Info LR 50" Flat screen TV
Awning Info 20' Electric One Touch w/LED Light Strip
Axle Count 2
Number of LP Tanks 2
Shower Type Radius
Electrical Service 50 amp
For more information, call us at 856-629-7400 or Contact Us
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Forest River RV Logo

In 1996, Forest River founder Peter Liegl had a vision. He foresaw an RV company dedicated to helping people experience the joy of the outdoors by building better recreational vehicles. Today, we have grown to become one of the largest RV manufacturers in North America, producing class A and C motorhomes, travel trailers, fifth wheels, toy haulers, camping trailers and destination trailers. From the new family just starting out in the world of RVing to the experienced full-timer, we offer something for everyone.


Forest River RV is a division of Forest River, Inc., a Berkshire Hathaway company, which produces recreational vehicles, pontoons, park models, buses, cargo trailers and commercial trucks. The diversity of Forest River, Inc., enables us to approach the RV industry with a unique perspective, incorporating lessons learned at each one of our divisions. Operating with openness across a wide range of products is what makes us stand apart from the competition. At Forest River, Inc., quality and dependability are a necessity in everything we make. 

Hitch RV is 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 @856-629-7400 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.