I would want to make sure the parts are interchangeable other military and commercial AR parts. If they use parts particular to the Ruger AR and not interchangeable with other ARs that would be a concern for me.
Ruger has stopped making parts for some of their guns. I have an older Red Label and they do not have parts I need.
A good friend of mine was shopping for a fun AR. He started looking at a Ruger, and ended up with a S&W. From what he said the trigger was bad, and the fit wasnt something he was willing to spend money on. Now for reference, he shoots match rifles, so the bar might be a little different.
Every day you see it on the news. Another felons life needlessly spared by inaccurate fire.
Like Dogface said you have to watch with Ruger AR parts as they tend to not be mil-spec, like most AR's. I have a S&W and a Stag model 3 both in 556. Both the S&W and Stag are all mil-spec parts. Also just picked up a nice Daniel Defense in 308.
I got one and I love it. I did replace the trigger though.
I don't know about others triggers, but to the best of my knowledge most lower priced ARs have mil-spec triggers, and mil spec triggers are like 8-9lbs pull. I got a 3.5lb pull the Ruger AR-556 shoots great.
Free men do not need permission to bear arms - Thomas Jefferson