Originally Posted by brainey64
Problem is i don't see anyone making them for a Ruger M77 MKII
I would look for a new spring and keep the firing pin.
I have changed lots of firing pins to the speed locks and the reviews are mixed.
But the new spring change seems to be the best way to speed up lock time, do
away with the serpentine condition that is common with springs that the diameters
are two large that cause drag in the bolt increasing lock time.
Springs are easy to fine ,And if you cant find the factory replacement another stronger
spring can be cut to length.
J E CUSTOM