I need to know that there are 4 grub screw on the dovetail of fx royale 400.
3 grub screws hold barrel and transfer port.
The 4th which is after the magazine loading space, is a bit loose.
Please let me know what is the use of this screw and how tight it should be?
One more question. The main valve has its spring. The outer cover of the unit can be tightened fully which will put maximum pressure on valve spring and it can be left a bit loose as well.
What is the correct setting?
3 grub screws hold barrel and transfer port.
The 4th which is after the magazine loading space, is a bit loose.
Please let me know what is the use of this screw and how tight it should be?
One more question. The main valve has its spring. The outer cover of the unit can be tightened fully which will put maximum pressure on valve spring and it can be left a bit loose as well.
What is the correct setting?