Re: AR 15 question
Any of the brands you name are GTG.
I have a STAG and love it.
Be sure it is chambered for 5.56 not 223. The military loads are higher power and cannot be fired in a rifle chambered as 223. 223 work fine in 5.56 chambered guns.
The round looks the same, it is the pressure that is different.
Federal has been selling 5.56 loaded like Lake City ammo for good prices lately. Federal runs the Lake City plant for the government.
Many of the manufac. offer stripped down starter versions. No crome barrell, no bolt assist, sight ready (which means no sights). OK if you are an occassional user, but over the long term, you probably won't be happy with it.
The AR15 forum web site has a lot of good advice on the various brands and configurations.