by Jerry Stephenson
I installed this trigger for a client. His rifle is Japanese. He bought the US model for his Japanese M 5 but his rifle had metric screws. If you end up having to make screws to attach a US trigger to a metric action here is what you need:
Front screw: M4 x .7mm x 12mm socket head capscrew. no modification.
Rear screw: 10-32 x 1/2" flat head allen screw. turn head down do .315" diameter. take about .010" off the top of the head.
Trigger was crisp and flawless after installation.