Just play as a mechanic and craft your own level 1 laser gun... All you need is like 240 in materials and the mechanic skill. It may be illegal in your system to carry a gun, but when has that stopped players from doing things.
GM: You arrive in spaceport, the customs officer asks for all your weapons.
Player: I give him my space pistol. "Sir, where can a honest mechanic like me buy some materials for fixing my robot?"
GM: "over at AbadarCorp of course."
Player: "Thank you sir." Walks to the store, buys materials, crafts guns for everyone in the party.