No
You take it to a gunsmith.
If you go to You-Tube and type in disassemble of Smith and Wesson model 915;there should be a video of the steps needed to take down your smith and Wesson semi-auto 9mm.
Take it to a gunsmith.
You take it to a gunmsith.
No need to for regular cleaning.
30 yrs give or take
Best left to a gunsmith.
Take it to an authorized repair center or a qualified gun smith.
Take it to a gunsmith
Best to take it to a gunsmith.
Best left to a trained gunsmith
You need to have it examined by a gunsmith to be sure.