The CJ-6 was a stretched version of the CJ-5 with a 20 in (508 mm) longer-wheelbase. The extended chassis allowed a variety of configurations, including adding a second row of seats. Introduced in 1953 as the M170 military version, the civilian CJ-6 made its debut in 1955 as a 1956 model. Never very popular in the United States, most CJ-6 models were sold to Sweden and South America.