Mini-Rig

A Mini-Rig was a small vehicle developed and released by Kenner as a toy. It was given a smaller size because of the lowered value. Only one Mini-Rig has made it into another official Star Wars production, a variation of the Desert Sail-20 Skiff. Besides the Mini-Rigs, Kenner also released three Body-Rigs.

Mini-Rigs

 * Wave 1 - 1981
 * MLC-3 Mobile Laser Cannon
 * MTV-7 Multi-Terrain Vehicle
 * PDT-8 Personnel Deployment Transport
 * Wave 2 - 1982
 * CAP-2 Captivator
 * INT-4 Interceptor
 * Wave 3 - 1983
 * AST-5 Armored Sentinel Transport
 * ISP-6 Imperial Shuttle Pod
 * Wave 4 - 1984
 * Endor Forest Ranger
 * Desert Sail Skiff aka Desert Sail-20 Skiff

Source

 * Star Wars: The Action Figure Archives