This blaster was only released with the Imperial Biker Scout figure and came in just the one colour - Grey - although the variations range from Light Grey to Dark Grey.
There were also 4 mould variations of the Bikerscout Blaster which have been catalogued below.
The Bikerscout Blaster V1 - V4 Mold Comparison Shots
V4 - Lili Ledy, Dark Grey
The Lili Ledy Bikerscout Blaster (as pictured below) is a much darker than all the other variants