Vigilante was shot across only three days, on the back of £110 and across five English counties (including Buckinghamshire, Suffolk, Essex and more). This mostly explains for the segmented feel of the final product and deterioration in quality towards the end - a piece of guerilla film-making to it's very core.
To get into the mindset of the character Vigilante, and ultimately to aid his directing flow for the film, Director Mark Allard went four days without sleep to bring on some minor effects of delusionality and a disconnected sense of reality.
The gunshot sound effects featured in the film were created using Christmas Party Poppers and reverb effects. By pointing the poppers at a .25 degree angle across the mic's front pick-up and firing less than two feet away, a small boom sound was created. The added reverb effects create the illusion of a small-calibre handgun being fired in a small room.