Originally Posted by taps50
I only have two questions about that PSA AR question. One when is it coming back in stock lol, and two I was talking to a buddy that owns 8 or so ARs and he told me that I would want a 1:9 barrel twist not the 1:7 twist. But now that I have been talking to a few people not just on here I think I am going to build my first one so I actually can learn how to disassemble and reassemble it properly.
PSA is pretty well swamped so stuff sells out quick, you just have to keep an eye on them to see when something comes back up. It's likely that a complete upper like the one in the kit will come up for sale before the kit does so you may have to piece it together. Still a great rifle at a great price though.
As for the twist rate, 1/7 shoots 55 grain pretty well, but does exceptionally well with heavier loads (62,69,77 grain, ect.), now 1/9 is a bit more accurate with 55 grain loads but doesn't shoot the heavy stuff as well.
A great compromise is the 1/8 but those can be difficult to come by.
Personally given the choice between 1/7 and 1/9, for a general plinker I'd go 1/9, if you plan any hunting with it or just like heavier loads go 1/7, both will serve you well.
Heres a chart to make it a little easier to understand.