Just a click away hkparts.net/shop/pc/HK-91-G3-Parts-c9.htm

Irv, as an derivative of one of the most NATO rifles parts should be quite easy to find Just do a goggle search for PTR-91 parts. Here is one of many places to look: hkparts.net/shop/pc/HK-91-G3-Parts-c9.htm

parts are available from HK parts from the PTR91 web site "HK Parts is now the exclusive distributor of all PTR Parts and Accessories" link to HK Parts hkparts.net/shop/pc/HK-91-G3-Parts-c9.htm

Parts should be relatively available Irv. I would start looking here : http://ptr91.com/store/