Ex-Military BMY M931A2 6x6 Turned Expedition Camper Lists for Sale

A 1990 BMY M931A2 6x6 that started life as a U.S. Army five-ton tractor truck is now on the market as a fully equipped expedition camper, offered from Golden, Colorado with build documentation in tow. The conversion was handled by Plan B Trucks of Utah back in 2017, and the finished rig stretches roughly 36 feet from bumper to bumper.

While civilian hands may not recognize the M931A2 name, it belongs to the M939A2 family, the turbocharged generation of the Army’s five-ton 6x6 fleet. BMY — short for Bowen-McLaughlin-York, a Harsco subsidiary — assembled these trucks in Marysville, Ohio, from the late 1980s into the early 1990s after the Army shifted the follow-on 5-ton contract away from AM General. Roughly 34,900 M939-series trucks were purchased across the program’s life, and by mid-1998 the Army still counted 31,800 in inventory, with 16,800 of them A2 variants. That long service life is precisely why so many have been trickling into civilian ownership.

Mechanically, the truck keeps nearly everything that made it a workhorse in uniform. An 8.3-liter Cummins 6CTA turbodiesel inline-six delivers 240 hp and 745 lb-ft of torque, routed through an Allison five-speed automatic and a dual-range transfer case, with Rockwell axles and a central tire inflation system that lets the driver adjust pressures from the cab for highway, cross-country, mud, or emergency conditions. Twin 75-gallon diesel tanks give the rig serious legs between stops, though filling both at today’s prices is not for the faint of heart. Build paperwork notes the engine was overhauled in 2008 while still in military service, and the truck has reportedly covered about 22,000 miles, with fresh Goodyear 395/85R20 tires fitted in 2026.

The living quarters are where the military hardware gives way to comfort. The 27-foot camper body carries wood-paneled walls and flooring, a dinette, a fold-down sofa, and multiple sleeping areas, plus a full galley with induction cooktop, microwave, and refrigerator/freezer. Separate wet and dry bathroom zones, diesel heating, and air conditioning round out the interior, while nine solar panels, lithium batteries, an inverter, and shore power connections set the truck up for extended off-grid living. Substantial water storage supports the same goal.

The finished vehicle even appeared on the television series “Extreme RVs” in 2017, a show built around oversized and unconventional motorhomes. Externally it wears a red and black textured bedliner finish, and the original heavy-duty chassis, air brakes, and drivetrain remain intact. For anyone weighing a four-wheel-drive van against a true heavy-duty expedition platform, this is the opposite end of the spectrum — a military-grade hauler reworked into a home that can go just about anywhere.