I have just picked up a P72 in .22 Magnum and would like to know what scope mount bases will fit the receiver ? Were these rifles supplied with factory bases? The rifle is in good original condition but something I find unusual is that the barrel has been drilled and taped for front and rear sights, instead of grub screws the holes have been plugged (no slot). These plugs are flush and well finnished, there is no change in the colour of the bluing. Is this common to these rifles, perhaps done at the factory?