The Merr-Sonn Munitions, Inc. Model J1 "Happy Surprise" Palm Blaster was a hold-out blaster that looked similar to the Stealth-2VX palm shooter. The J1 resembled a grip with a tiny barrel sticking out from the front, protruding from between the user's fingers. It was activated by a thumb trigger on the top of the weapon. The J1's biggest strength was its ease of concealment, as its construction allowed it to be hidden in nothing more than the user's clenched fist.
The weapon's name was actually the weapon's name in Rodese—Kheth-saw—translated to Basic. Alliance to Restore the Republic operative Matt Talon carried a Happy Surprise as part of his personal arsenal.
- Galaxy Guide 9: Fragments from the Rim (As "Happy Surprise hold-out blaster")
- Galladinium's Fantastic Technology (As "Happy Surprise")
- Arms & Equipment Guide (First identified as Model J1 "Happy Surprise" Palm Blaster)
- The Complete Star Wars Encyclopedia (As "J1")