# OPUS OP4 BASE

BASE is a popup floor plan by OP4 (OPUS).

## Specs (2026 model year)

| Spec | Value |
| --- | --- |
| Length | 20 ft |
| Sleeps | 6 |
| Slide-outs | 0 |
| Dry weight | 3,100 lbs |
| GVWR | 4,200 lbs |
| MSRP | $37,000 |

## Model years

2026. Year-specific specs: `https://rvenvy.com/popup-campers/opus/op4/base?year={year}`

## Overview

The OP4 BASE stands out among popup campers by including a full bathroom - a rare find in this lightweight category. Despite its compact 20-foot footprint and 4,200-pound towing weight, this OPUS model accommodates up to six people. The inclusion of a complete bathroom facility eliminates campground dependencies and extends your off-grid camping possibilities.

## Inventory

No units currently for sale. Search similar inventory: https://rvenvy.com/inventory

Floor plan diagram: https://images.rvenvy.com/b5ceb91fb1329cf5edd28ccda99e550134245c95d08bde7da496e9c8fbe71deb/1024.webp

Canonical page: https://rvenvy.com/popup-campers/opus/op4/base