Today i got my No.V MK.I and have some questions

[gunner]

Thank you all for your nice comments! Today i had the buttstock at a friend who is a technician with the German Police and he said its indeed R.F.I. and not R.R.F.. There have been to little scratches that made me think it is like i said. So, Ridolpho was correct at this point. I ordered a rifle sling that looked like a original one. Hope it is when it comes.