I fired my friends PTR-91 and found it to be a comfortable rifle to shoot and IMO more user friendly than the HK-91's. Reliable,well made and accurate shooters. I am not as lucky as I own the new Century C308. When I compare it to the PTR I see many similarities though. New barrel, new furniture, upper receiver but the lower receiver housing is a phenolic and I believe the bolt, bolt carrier trigger, safety and sear are surplus parts. I added the extended charging handle (IMO a necessary upgrade) but nothing else) . While the PTR-91 uses a few more new parts, believe it or not, the accuracy of the two rifles is exactly the same. Both shoot 1 1/2"- to 2" groups @100 yds. Both feed 100% reliable but the Century recoil is slightly lighter. I suspect that PTR makes this version of the rifle for Century as they handle all warranty work for it. If I had to do it all over again I would go with the PTR for $150 more, but so far so good with the Century.