New 2026 Grand Design Momentum M-Class 399M Fifth Wheel

2026 399M Features and Options
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What Our Customers Are Saying

Outstanding service at Summerland RV

Thank you, Sharon, for the outstanding service at Summerland RV. Its people like you that makes all the difference in the RV Industry. I called you as a Winnebago Dealership, you listened to what I needed, ordered the parts, and did not give me the traditional run around. I truly appreciated the leadership, sincerity in you organizing everything for me to come in to have the parts installed in a timely - Wallace
Price: $198,482
You Save: $33,987
Sale Price: $164,495
Campers Inn
Location: St George,UT
Stock# 21175569
Location: St George,UT
Stock# 21175569
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1-855-266-9882
RV ID: 3373451#
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2026 399M Specifications
Length 39 ft 9 in
VIN 573FM4735TBB04719
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