Dunno, looks like an SSK heavy blaster to me.
http://starwars.wikia.com/wiki/SSK-7_heavy_blaster_pistol
The SSK-7 Heavy Blaster Pistol, manufactured by the SoroSuub Corporation, was designed in the early days of Palpatine’s New Order. The Rebel Alliance managed to acquire large quantities of these weapons just before Imperial edicts came about, making the purchase of such weapons illegal.
Hokey religions and ancient weapons are no match for a good blaster at your side, kid.
Han shot first. ;-)