No there are ways, it invalves drilling holes to vent gas witch operates the gun.
It will fit on the frame but the action will not function with 3 inch shells.
You will need a slide/ barrel bushing that will fit the barrel you want to install.
Yes they are interchangable.
A PMI razzor barrel (spyder thread) will fit your barrel needs. You know it will fit if it is "spyder" threaded.
Barrels are to small to fit any one horse into it. So no horses can fit into a barrel.
no there are some minor adjustments to the safety area