i signed up hoping you good folks would help me put together a quality .308 ar. i've had a couple colt 223's and a springfield pos .308 and that's the extent of my rifles. i want a 20" bbl fwd assist dust cover upper but can't decide on a lower. have heard different things about dpms and armalite lowers on sites like m4carbine.net. i really dont wanna dump a bunch of $ into a pos. been there done that with the springfield 91 copy currently own just 3 g3 glocks: 17, 20, 26. plan to get a dillon 550 to reload. any unbiased info will be appreciated