Hi! I'm brand new here. I have a .38 spec. M&P 5 screw I just bought today, it was too pretty to pass up. It is a hand ejector square butt. Serial #315083 on bottom of grip frame. Serial # matches on cylinder and bottom of barrel. Patent dates on top of barrel are Sept. 14 09 & Dec. 22 14. It has wood S&W grips that covers the rear screw on the side plate, # stamped inside both grips is 143815. The barrel measures 3 & 5\8 inches from front of cylinder. Bore is bright with no pitting, rifling is still sharp. Cylinder bores are 99%. Very slight rings in a couple. No rust or stains anywhere except looks like front sight blade was soldered back on and maybe barrel re-crowned and never properly refinished, I can fix that. I would like to know when it was made and if it safe to shoot. I read anything before 1920 should only use LRN standard loads. It sure is pretty.