My AR22 trainer is finally complete. The upper is a Tactical Solutions with the SBX shrouded barrel (similar to the 10/22 SBX barrel). Add a GemTech Outback II and it gets even better. The SBX barrel is 16.25" and with the suppressor added 16.75" giving you all the advantages of a suppressed SBR without the extra stamp. My wife loves using this rifle.