The Atlas action was added in 2009, the Prometheus and Nanook were added in 2021, and the Atlas Lite was added in 2022. All are Remington semi-clone actions, all are available with magazines, and only the Atlas is available as a single shot. They have a Remington 700 footprint, but use proprietary 1-1/16th x 18 TPI barrels. Repeaters have a flat boltface that makes them very easy to chamber (no bolt nose recess to cut). Action bodies are made with pre-hardened 416R (gun barrel quality) and have an ETD150 one piece bolt, this makes them extremely durable and designed for a lifetime of use. We back them up with our lifetime warranty.