Hi lads/lasses

i currently have the above MOD with a 1/2 inch thread and would like to use it on my sako 85 with a m14/1 thread , can i order the m14/1 spigot/adapter and just swap the threads over? so in theory two threads and one set of baffles , or being classed as an individual item on my lisence is there some pain in the bum rule that says it must be noted on my lisence as two seperate mods, hope this makes sense.
and anyone have an idea of cost?
many thanks