Speaking of the safety, I just installed a Timney trigger on a Mosin Nagant for a family member and it comes with a Rem 700 style safety. You have to inlet the stock for it, but its worth the hassle and very simple to use. Anyone familiar with the safety on a Rem 700 would appreciatte it on the Mosin Nagant.
As for the Timney Trigger itself, its adjsutable between 2-4lbs, and comes factory set at 3lbs. Its super simple to install, very crisp with absolutely no travel or play, plus has the additional 700 style safety. Its a huge upgrade over the stock military trigger. It cost almost as much as the rifle itself, but if you like the Mosin and want to shoot it to the best of its ability and/or you like tinkering then its worth every penny. You have to inlet the stock quite a bit for it, but just take your time and its fine.