Darrell H,
The stock barrel has a minimal amount of threads because it is so thin. The thread engagement is only a little more than 1/8". With the loads that I shoot (36.5 Lil gun behind a 400gr hard cast boolit) it generates ALOT of recoil! and chronographs 1850fps. I'm going to try to JB Weld a Stratton hangar onto the barrel and mount a laminated forend. Will let you know if that works.
By the way great looking rig you got there...