Paratus is a patented quick change barrel and takedown semi-auto rifle chambered in 7.62 Nato and 6.5CM. The rifle can be assembled in less than 60 seconds without the use of any tools. It was originally developed for the Clandestine Breakdown Sniper Rifle (CSR) project listed by Joint and Special Operations Program. It is the most compact auto loading rifle in the world, with features like folding/adjustable stock. The patented internal recoil system eliminates the standard buffer tube/spring associated with most 7.62 Nato rifles allowing the rifle to be fired with the stock folded.