I will be picking up a new to me S&W model 37 (SN# J558xxx) this Sunday from the FFL after my 10 day wait, man it's been a long 10 days. It will be my HD gun and I had a question that I need help with. I dont know all the correct terminology but here it is; is there a bar between the firing pin and the primer like newer revolvers that would stop a accidental/ negligent discharge if the hammer was hit in any way? I know some use a snap cap on the top of the cylinder to avoid the firearm discharging if dropped. Thanks for the help, soon I will be up to speed.