i own an ai 06 and wouldnt recomend you go down the improved road. the barrel will have to be set back a full turn,to effect a full clean chamber and head spaced to the centerline of the shoulder.you need at least a 26 tube to get any benefit worth talking about.mine is a 22 tube and i think the exercise was a waste of time and money.couldnt pick much difference in velocity and when i did,extrac