Decided... I will sell the two Walthers. My heart is bleeding, but if I think that I can have a thing close to an M16 I can find some relief. The model I choosed is a complete rifle: Olympic Arms K4B. M16 bolt type, carrier, A2 Flashider stocks and handguards, bayonet lug, 10 rounds mags (I heard rumors that maybe Italian govt. is going to issue legal 18 or 29 rounds mags...). The only thing this rifle miss is a full auto trigger group, but really I don't feel the need of it. 10 Rounds are enough for target shooting and basic self defence. If SHTF will be heavy, I think that nobody will care if you are using illegal or legal capacity mags.
Oly in Italy are snobbed, because people see only Colt, but ALL the people I met at range and bought Oly, told me they are really accurate. The MT I can find here in Italy are of poor quality, without bayonet lug, flashider and cost quite more that clones (Stoner apart... but they are another class of rifles...)
Thanks for the help in deciding, boys... I'll keep you updated. [;)]