Bushmaster QRC Combo 
Bushmaster puts a lot of technical advances in your hands for under $700, and that includes red dot optics, which saves you even more money. Chambered for a .223 Remington/5.56 NATO, this model comes standard with a 16” chrome-lined barrel, birdcage flash hider, a Picatinny rail, and a 30-round flag magazine.
Specs on this Bushmaster have it at a cool 6 lbs, very nice for a weapon this inexpensive and decked out. As you may have already noticed, this is the only carbine on this list that includes optics.
Bushmaster is a very popular manufacturer for these AR clones, and thus a lot of purists tend to dismiss them. No matter how many times some people hear the words, “there’s nothing wrong with a Bushmaster,” they still want something else.
For those who can take those words to heart, you’re getting a very solid, “ready-to-shoot” AR for an unbelievably low price. From our experience, we’ve shot a lot of custom builds that cost five times what this rifle costs and have 500% more jamming problems.
Lowest Retail: $699