I have done some work with Tok firing pins, I made a new one shorter so that it operates as an inertia pin as in a 1911, this worked very well with reloads using CCI550 Magnum primers, it worked marginally with M42 military small pistol primers, all fired but small primer indents, would not fire small rifle primers.
I don't see much data on capabilities of various primers to hold high pressures, but the 42000 psi pressure is pretty high to use small pistol (commercial) primers, being intended to use in small handguns (32ACP, 380ACP) normally using 18,000 psi pressures. The M42 primers are to a military spec for the NATO 9x19 which is loaded to 38,000 psi, probably OK for the Tok loads.
I have been able to verify that the firing pin length, that is the amount it penetrates into the chamber, is fairly critical. I think this is because the cartridge headspaces on a rather poorly defined shoulder rether than on a rim or sharp case mouth, and is typically driven further into the chamber by the firing pin, The original Tok pin (Russian) penetrates .065, a new pin having the stop groove limiting penetration to .035 doesn't fire any primers.
I am going to try moving the edge of the retaining pin groove to permit the pin to penetrate further to see if it will fire on inertia, that would not be a true inertia pin, so is only an experiment. I also need to point out that all these tests were on new or once-fired resized primed Starline cases with primers only, the added weight of a bullet in the case might affect the way it fires. I was hopeful about the inertia only, but thinking obout the 1911 45 caliber, I realized that it is an 18-20,000 psi cartridge and the large pistol primers might not be suitable for high pressures either. So probably using an inertia pin with really high pressure cartridges is not desirable.
The short version of that is that if one really wants to carry the Tok, the only practical option is to depend on the half-cock stop, I have no contact with any of the aftermarket addded safeties, but what I have heard about them doesn't inspire confidence