I have a 1.0 version in 40SW. It has the APEX kit installed. I also have a 357 sig barrel and recently purchased a Storm Lake 9mm conversion barrel. It is a keeper for me as I can shoot 3 different calibers. The accuracy is good enough for me. I am not concerned with 2 inch groups at 7 yards. I am totally satisfied to get all rounds in 4-8 inches (relatively rapidly) and consider that good enough to down a bad guy (which I hope never happens). I had a 2.0 in 9mm but did not like the rough grip texture. Sold it fairly quickly. Also have a shield 1.0 and 2.0 and considering selling the 2.0 (again the grip texture).