I bought the phaser on ebay for 10.00 U.S. dollars. Then I bought a high mw green laser and placed it in the prop. Now it pops balloons.
Step 1: The Laser
It is commonly known as the New Wish laser from Deal Extreme. A similar laser can be found at Radio Shack.
Mine was niether of the two brands because I bought it in Asia but usually they just rebrand the same lasers that come from china.
-Well thats what most people say:)
Step 2: Removing the laser from the pen type housing
Step 3: First cuts
Your going to need to dremel the bottom half of the body in the middle where the speaker rests. You don't have to use the round sanding tool but I found that it's easier to cut the small space than using a cutting wheel. The cut just has to be large enough to fit the laser electronics.