Goo shoots and functions very well. Had one of the Instructors from the Air Marshal's program out shooting it. Felt recoil like that of a GI carbine. Using 110gr FMJ carbine bullets. Working on a 125gr FMJ load now. Working on a PDW system using Garandicon action in .221 Fireball. 16 inch barrel 15 round magazine. Trying to get it down to around 5-6 pounds in weight.