this is stamped on the underside of the bolt handle, opposite the side where you normally see a s/n. noticed this on the bolt that came with the 39 bsw r/c i got a few weeks ago.
in case you are curious, i used a regular digital camera and an a/o spencer microscope to get this picture.
in case you are curious, i used a regular digital camera and an a/o spencer microscope to get this picture.