I bought a Stag about a year ago. Forget what model it is, but with fixed stock, flat top and 20" barrel. First AR15 that I've owned, but I did have some experience with M16s in the 60s. I bought the Stag to shoot varmints around the farm, especially coyotes. It's performed great. Shoots every kind of .223 that I've run thru it. I put a 4x Monarch scope on it, which has worked fine since I don't shoot at anything over about a 100 yards. Stag build quality is very good. Just keep it lubricated. I use to carry a Ruger Ranch Rifle in .223 around in the truck for coyotes, but it wasn't accurate past about 50 yards. I now carry the Stag instead.