The movie in question is probably "Taxi Driver" in which Robert DeNero strapped a drawer rail to his arm to make his own secret sleeve shooter. Either that or "The Adventures of Ford Fairlane" which had Andrew Dice Clay use a similar setup that had a bad habit of dumping his gun on the floor.
As for the gun, nice mod! I've got that SpyNet shooter too, and it STINKS! Overpriced, proprietary ammo, piss-poor range, but you brought it back from the dead!
Try replacing the orange tip with a copper coupler in the air restrictor cavity. (A cpvc one won't fit)
I rather like the idea of priming the blaster and pulling it back at the same time
Edited by Jimu RetroGuru, 08 March 2013 - 03:32 PM.