So Palitoy may of substituted the SA-80's (& Sten guns), in the early days, as the laser rifles may not of been ready or available in time... or, during mid production, they simply ran out of the correct accessories & kept the girls in the packaging going by urgently digging into the stock cupboard:

"Um...they look 'Spacey', use them"
I often regret that Palitoy never put Star Wars style 'Country Of Origin stamps' on

figures, it may of helped in identifying all of the various variants all these years later.