RT9 / RT303 Squat / Space Dwarf Heavy Weapons
Released as RT9 Squats in December 1987, in January 1988 these became Space Dwarfs in the RT303 series, but are shown on the RT1 Flyer as RT9, very confusing!
RT9 Squat Heavy Weapons - Winter 87 Flyer
RT303 Space Dwarf Heavy Weapon Crews - WD97 (Jan 88)
RT303 Space Dwarf Heavy Weapons - Astronomican (Feb 88)