Properly trademarked Barrett licensed M4. Body is VFC with aftermarket (real steel) rail. Internally it has a fully built and reinforced SSG. -All CNC compression components -CNC gears -Metal tooth piston -SHS M120 spring -ZCI full metal rack piston -Microswitch trigger -Prowin hop up -Prometheus bucking -ZCI 6.02 TBB COMES WITH ATTACHMENTS PICTURED