hi woody. if you bought a brand new geo 2.1 the only difference between that and this gun is the reg swivel. if you look at the geo 3s, the 2.1s have that swivel instead of the elbow coming out of the reg. makes no difference to the functionality, in all other respects it is a 2.1. so i guess technically you could say as it doesnt have the reg swivel attachment it isnt a 2.1, but in every other respects, it is. does that help?Can you please confirm its a 2.1?
I'm a little confused with the early posts of 2.1/2.05!!!