This does not look like a good idea to me, the ballistic dust will likely de-certify your cleanroom!
Normally you don't have to actually use the gun, only act like you intend to use it and you really really mean it with a really really mean voice.
"WHERE ARE THE BYTES?!?"
A cleaner DIY method courtesy of Jack Bauer :
“Russians didn't have hi-tech equipment, so they kinda had to make do with what was around. Sort of like what I'm doin' right now. You probably don't think I could force this towel down your throat. But trust me, I can. All the way. Except I hold onto this one little bit at the end. When your stomach starts to digest it... I pull it out, taking your stomach lining with it. Most people, they take about a week to die. It's very painful.”