Interesting use for a bushy-esque grip frame...

[FirePro84]

http://tshirtgun.com/deafleopard.html

Looks to me like an old bushmaster frame on that epic air-horn...

oh the pranks that could be pulled off with that.......

[Nobody]

that is a ICD B2K4 frame. it has the 3 points for the trigger pin, and the cut outs for the tray. i'm thinking that they either got them off ebay, or went to ICD direct

[FirePro84]

for a company to use them for a production product I would imagine they had to get them directly from ICD at some point...no idea how old they are though, lol.