Just found out while cleaning my KRISS .22lr that unlike centerfire variants, the barrel is not pressed in and is easily user swappable (2 allen screws and a locking block much like the 10/22).
Once removed, the barrel "extension" also looks much like a 10/22 barrel.
I bought the 16" version of the KRISS .22 as I really liked the duo-tone black/FDE receiver but always wanted the short barrel.
Ever thought about producing barrels for this platform?
Any interest from other gunnutz?