The two holes dont normally align, the trigger basically pushes the smaller one up to align with the bigger hole. The striker is an arrow head shape that sits in the bigger hole and is held back by this non alignment. Pull the trigger, aligns, bang. The issue arises when the two pieces break or one of them does. Then you have a dead, hard to fix gun unless you get something made.
The issue even with the replacement steel piece is that the hole is too big for a gas striker, so I had a plug made for the hole with another hole bored into it of the correct size. Probably the most solid Mosin out there, wish I hadn't sold it now...
The interesting thing with this rifle is that I *think* it should be possible to mate the Wingun CO2 version lower receiver with the PPS hop unit which would solve the flaws inherent in both