No, they do NOT advertise that you can put in a BX-25 trigger.
It is NOT compatible and the rep at last year's SHOT show specifically pointed that out. A lot of the trigger components like the hammer are individually compatible but with the mag well the geometry is different. NOT compatible. Believe me, I own both a PC-9 and 10/22.
I think someone will make a pistol grip/collapsing stock with more rails and such. There may be an integrally suppressed barrel in the works.
I still have the odd fantasy about a carbine in 9x18 Makarov
