Could you use insulation foam that has adhesive on one side? Like the stuff they sell at hardware stores for window insulation or the stuff at auto stores for camper shell insulation?
"My paintball kid can mow your honor student"
"A redshirt is a stock character in science fiction whose sole purpose is to die violently soon after being introduced." - wikipedia.org (like me in paintball)
My setup: Intimidator (Alias), Apache Ricochet hopper, Matchstick barrel kit.