I'm selling a RRA complete upper in excellent condition. This upper is chambered in .223/5.56 and has a 16in heavy barrel. The upper also has an aluminum free floating quad rail. Has a magpul 45 degree grip. Finally it comes with a cheesy red dot that cost like $150. Works fine. Had no problems with the rifle, just freeing up space in the space for new toys. This upper will fit on most lowers so you can practically have a new rifle for much less money.