# Heartland Milestone 377MB

377MB is a fifth wheel floor plan by Milestone (Heartland).

## Specs (2025 model year)

| Spec | Value |
| --- | --- |
| Length | 42 ft 11 in |
| Sleeps | 8 |
| Slide-outs | 4 |
| Dry weight | 12,511 lbs |
| GVWR | 15,000 lbs |
| MSRP | $101,071 |

## Model years

2025, 2024, 2023, 2022, 2021, 2020, 2019. Year-specific specs: `https://rvenvy.com/fifth-wheel-trailers/heartland/milestone/377mb?year={year}`

## Overview

The 377MB puts the living area in the rear with a window to match, which makes for a surprisingly open feel when you're relaxing — and the mid-bunk layout keeps the front bedroom private and quiet. Heartland loaded the kitchen end with a residential 14 cu ft fridge with built-in wine cooler, a 21" oven, and anti-microbial solid surface countertops on a peninsula, plus an outdoor kitchen for when you'd rather cook outside. Two 190-watt solar panels, a 2000-watt inverter, and one-touch auto leveling mean less setup hassle and more off-grid capability than most rigs in this class. Toss in a 40" fireplace, JBL sound system, loft, and washer/dryer prep, and this is a floor plan built for people who want to stay longer, not just pull in for the weekend.

## Floor plan tags

bath and a half, loft, mid bunk, front bedroom, rear living area

## Inventory

9 units currently for sale priced $34,888 to $59,999: https://rvenvy.com/fifth-wheel-trailers/heartland/milestone/377mb/inventory

Floor plan diagram: https://images.rvenvy.com/4c13614c1b20721d99e51b88989eb749527552d69dedca50cf11e2965855c3d3/1024.webp

Canonical page: https://rvenvy.com/fifth-wheel-trailers/heartland/milestone/377mb