Nice set of AR's! I own several AR's of different flavors but one of my favorites is my Stag Arms dedicated 9 mm that takes the Colt/ Uzi mags! It is amazing how many AR fans have not tried a 9 mm version! Once they do many are hooked! My love for them started back in the mid 90's when the agency I worked for got some of the Colt Sub-Guns in 9 mm w/ 3 shot burst. They are amazingly accurate inside 100 yds and easy to keep on target! Another bonus is they are a breeze to clean after a long range day!