These Real Action Paintball (RAP4) Paintball Guns are most realistic mil-sim Paintball Guns you can get. These RAP4 Tippmann 98 paintball guns use the Tippmann Model 98 Custom paintball gun as the base and then add high quality RAP4 accessories to provide different mil-sim versions. Using the very popular and highly effective Tippmann Model 98 Custom ensures that you have a very high quality product.