AR-15 Rifles

AR-15.com does have alot of info and pics on it, but joining is a PITA, i'm supposedly a member there, but i had trouble logging in and when i emailed them to help me out, i got shot down and they seemed like they refused to believe that i was a member. I bought a DPMS upper and a Spike's Tactical lower. I plan to put a Magpul PRS stock on it. I also want to put me a Nikon on it. And after thinking about it, after deer season i may buy a 18" SPR barrel and put on it or send my 24" to Ballistic Advantage and get it cut shorter and turned down to .750 gas-block forward. I also want a larue tactical 13.2 handguard if it will fit over the gas block, i know it will fit over a .750 gasblock, but i don't know if the .922 can be milled down enough for that.