“We don’t do cool,” reads the Machine Gun Blues website. “We work our asses off to bleed on stage.” Of course, the outfit is wrong on both counts: Its ragged, pounding fusion of the Stooges and ’60s British R&B is infinitely, if not self-consciously, hip. And no matter how much raw energy the members burn while performing, it all seems to come as naturally as breathing. But they aren’t as haphazard as their booze-basted live shows might imply. The band’s debut album — due in the spring of 2006 — has been in the works for almost a year, held up by perpetual revisions and perfectionism as the group evolves even further into a seething, punk-injected bastardization of the Spencer Davis Group. On Saturday, November 5, Machine Gun Blues will open for the legendary garage-soul act the BellRays at the Larimer Lounge, along with Atomic Bitchwax and Black Lamb. Don’t be fooled by the quintet’s devotion to rock-and-roll chaos, though: Underneath all the sweat and shattered glass lies a pounding, precision-engineered Machine.