Alternative D20 Firearm Rules
These rules are not intended to be comprehensive – they are a replacement for any of several D20-based system’s firing modes and “recoil” systems. They are a deliberate balance between realism and complexity, and are intended to be “feat lite”, since many d20 firearm systems would render low-level soldiers largely ineffective (as well as being overly complex)!
It also includes an optional “wounds” system, and energy weapons with heat management
Note; It is fully intended that burst fire has very low accuracy, due to the number of shots you can take with it and the high damage on hits.