There are three shotguns that are really best for 3Gun, the M2, M3000 and the VersaMax. There are trade-offs and dollars to be considered with each one.

All of that said, you owe to yourself to get to the range with all three and understand them, shoot them and pick the best one. I don't care what pistol or rifle you have, I can pick them up and shoot 95% of my skill level if they run 100%. With a shotgun that does not fit or feel right, I might only be able to shoot 75% of my skillset. The shotgun is so important to good scores in 3Gun and there is more than just the platform to consider. Ghosts are fine for some things, but not the speed of 3Gun.