I have what was once a Bushmaster (piece of crap when I first got it used off of a friend real cheap)...it now has an Olympic Arms Upper, a reworked Bushmaster lower, a Pac-Nor target barrel (heavy) and a reworked adjustable trigger...after all the work, I have about $1300 in it...it shoots good now, but was horrible when I first got it. I also have a Rock River (entry tactical) and paid about $850 on sale at a gun show and have had to make no adjustments to it and it is a tack driver! I love the Rock River...great rifle!