I'd start with thoroughly cleaning out the striker channel. Having it for a number of years it might have had junk in there that gummed up the works over the years.
Some early production guns were found to have machining debri left behind which didn't help either.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."