SW use axes and chainswords.
RG use lightning claws
SAL use thunder hammers, melta and flamers
BT use power swords and shields
BA use chainswords and axes
FT use chainswords and chainaxes
SH use chainaxes
IH have their weapons attached to their cybernetics
IF use power fists
CF use power fists
UM use axes and power gladiuses

This is the only way.