Re: DOES ANYONE KNOW ??
If the pin channel is full of grease then the pin needs to be removed anyway or the whole bolt needs to be soaked in a degreaser or laquer thinner is even better. Its not all that hard. Grease over time will harden or collect fouling and cause the pin to stick in position. The only way to prevent this is to clean it. Pin should float freely in the bolt, not be a sticky mess inside of it. the slam fire system is nice but if the firing pin is a hot mess then it won't help you.
Only cowards shoot with their eyes closed....