Paper Blasters are a project currently on Indiegogo for high-quality, durable cardboard models of AR-15s that fire prepared paper wads up to 75ft via a spring-loaded action. The basic kit includes: skeleton with all internal mechanics, layer one camo skin, layer two camo skin, 8 gold shells with 50 pieces of pre-made ammo, mold to make additional ammo, and a zombie head target. The camos shown are Digital Ops, Golden Touch, and Zombie Slayer.
http://www.indiegogo.com/projects/cardboard-warfare-blast-paper-ammo-up-to-75ft