I prefer the Lancer awm mags over the pmags.... I have and use both... Definitely like the metal feed lips.... They also make 5 round magazines but I've found that only way to get the 5 rounders is to call lancer direct.... Just spoke with nate at lancer today and ordered some 5 rounders for hunting.
Nate said to expect their 308 magazines to be available around December this year.... Give or take... Nothing concrete on their release.