semi autos with pop off

[Major Collins]

i had a long and thoughtfull gander at zy's 50 cal qev gun ( http://www.spudfiles.com/forums/50-qev- ... 21420.html )
and it got me thinking, if he added a pop off valve on the exaust side of the blow gun and assuming that he has an air chamber that can hold a fair amout of air he could have a few shots and a semi auto right?

on the side note it would already be semi auto but depends on how lightly the trigger is pressed right? or in theory anyway

[Lockednloaded]

I believe his method is closer to a hammer valve, and therefore self-regulating and consistent

[Major Collins]

how did you come to this conclusion?

so you think it should just rely on how hard you pull the trigger opposed to a pop off ?