cool find

[Lockednloaded]

I was just browsing some youtube spudgun when i found something totally awesome. it seems to be a full/semi automatic sprinkler valve paintball gun! he doesn't go into much detail besides the fact that he is using a BFB. I was thinking pop-off, but he says he can fire it semi automatically as well

Here's his uploads, tell me what you think
http://www.youtube.com/user/ukilliheal# ... YJFysE81_k

[Technician1002]

Broken youtube link. [youtube][/youtube]

He does have a link in the video showing the blow forward bolt portion. Too bad it is not clickable. Here is the link in the video.
http://www.gizmology.net/pbm.htm

[Hotwired]

Well the bolt is a common blow forward bolt as used in some markers.

I'd say it was a pop-off valve too, doesn't say how easy it is to change between semi and auto.

So guess here is that to get semi you take off the pop-off valve and stick something along the lines of a blowgun there instead. Or as it looks like, a ball valve.

[Lockednloaded]

I knew it was a blowforward, I was just curious how he could switch between full and semi

[jackssmirkingrevenge]

This was the diagram that inspired my own blow-forward efforts

[Gun Freak]

Yeah I've seen that site before, pretty nice.