agree a big +1Without a doubt the new G.I. model. Search the net, HK Pro Forum under Clone Talk. You will find countless accounts of most PTR's choking on surplus ammo with tar sealant. It clogs the flutes on many PTR's.
The PTR 91 GI was produced to correct this problem. It is a very true copy of the origonal G3 / HK91. Taperred barrel and all. I dumped my PTR91K for 850.00 just because I didnt trust it (It was very accurate though). I stockpile surplus ammo so a G.I. Is on my list now.