Airsoft Gas Blowback, Shell-Ejecting SPAS-12 Custom Build 

A custom project that began eleven years ago, splicing the internals of an airsoft Maruzen M1100 to the externals of a Tokyo Marui SPAS-12, with a few donor parts from other manufacturers. HPA-powered, shell-ejecting, 9-BBs-per-shot, one of a kind.
Music by Karl Casey @ White Bat Audio.