Although on screen it didn't seem like that many Jawas were armed, apparently a lot of them were.

These blasters were used by the Rebels aboard the Blockade Runner in their vain effort to stop the Empire from boarding the craft.

Bespin Security Guards were seen carrying these blasters on Cloud City. This one has kind of a Jetson's look to it.

In the scene were Luke confronts Jabba the Hutt, Luke manages to pull a blaster similar to this one from one of Jabba's guards.