The 2.36in rocket was produced after WWI as a anti tank rocket. Earlier models of HEAT rounds have a round ogive and round tail fins during the second world war the HEAT rocket design was changed to have a pointed ogive and long straight fins.
Left to Right: M7 practice, M6 HEAT, M7a3 practice, M6a3 HEAT, XM MKII Grenade warhead made for fighting in the hedgerows of Europe
M6
HEAT
Round/ Point windshield
546mm
OD with yellow markings
M10
WP SMOKE
Round windshield
434.34mm
Gray with yellow band and markings
M26
GAS
Round windshield
448.56mm
Gray with green bandand markings
T27
SMOKE
Round windshield
408.94mm
Gray with black markings
T31
INCENDIARY
Round windshield
449.58mm
Gray with red band and markings
M7
practice
Round/ Point windshield
546mm
Blue or Black with white markings