These are the numbers on the gas regulators. 1.1, 1.2, 1.3, 1.5 and
1.7. The higher the number thee more gas. If you see a 5 I assume it's on 1.5. I normally run mine on 1.3 but it's dependent on the mil surp ammo you are using. 5-6 feet ejection sounds about right. Mine ejects slightly further. I use Czech Silvertip.