Variants
Me 163A   Versuchs versions (6 built)
Me 163A-0   Pre-production aircraft, used as trainers for future Me 163B pilots (10 built)
Me 163B-0   First operational version created, differed in some respects from the Me 163A versions, armed with 2 × 20 MG 151/20 cannon, directional control was exercised by a more conventional rudder, and pitch and roll were controlled by the elevons.  6 prototypes and 70 pre-production aircraft (Me 163B-0) were ordered, of which 30 of the latter batch were used as test aircraft with Versuchs numbers (V1, V2, etc) (70 built)
Me 163Ba-1   Remainder of pre-production aircraft that wasn't used in the development program were used for service evaluation and training. These were later redesignated Me 163a-1 Komet. 
Me 163B1-a   First true production batch, armed with 2 × 30 mm MK 108 fixed forward-firing in the wing roots (about 250 built, 16 accepted into Luftwaffe) 
Me 163S   Tandem two-seat trainer for training pilots the gliding aspects of the Komet, in place of main T-stoff tank was another seat for the instructor, in a raised cockpit, C-stoff tanks were used for water ballast
Me 163C   Fitted with an improved Walter HWK 509C-1 engine, (2 prototypes, 3 production built) 
Me 163D   New design with a real tricycle landing gear and many other (unspecified) improvements (1 built)
Me 263   Redesignation of the Messerschmitt Me 163D 
Redesignated aircraft 
DFS 194   Forefather of Me 163, this aircraft stood model for the airframe of the Me 163 Komet (1 built)