Concussion rifle and Spike Rifle custom animation video - Crylo mod for Far Cry

Lets say about 7 hours for both of them together, the animations wasn't the hard part, getting the scripts and sounds were painstaking, the spiker firing sound effects are...erm...weird, i know, Cryengine works by having so called *loop* firing sound file for weapons like this, but right now i have single firing sound files what cryengine cant handle with this speed.
I'm thinking about making projectiles for spike rifle, since now its instant hit but i dont know if engine can handle so much projectiles..