;M-5-180C :Initial production variant with a
Lycoming O-360-C1F engine, more than 94 built. ;M-5-200 :One aircraft modified with a engine. ;M-5-210C Strata Rocket :180C with a
Continental IO-360-D engine in a revised cowling, 206 built. ;M-5-210TC Lunar Rocket :210C fitted with a turbocharged
Lycoming TO-360 engine, 10 built. ;M-5-220C Lunar Rocket :210C fitted with a
Franklin 6A-350-C1 engine, 57 built. ;M-5-235C Lunar Rocket :210C fitted with a
Lycoming O-540-J1A5D engine, more than 379 built. ;M-6-235C Super Rocket :235C with a wingspan and more fuel capacity, smaller ailerons and larger flaps, 136 built. ==Specifications (M-5-235C Lunar Rocket)==