Ar-15 M4 Upper Receivers M-Lok 5.56mm - Ar-15 16'''' M4 Complete Upper Assembly

Sometimes all you really want and need is dependable, quality, AR-15 parts that go bang when you need them too, and don't break the bank to purchase. We sure think so, and to help you achieve that goal we are happy to offer these Brownells AR-15 Upper Receiver groups. We teamed up with a respected manufacture to build out these two models of upper receivers, one complete with a Bolt Carrier Group and Charging Handle, and one that does not include these two items to let you select the BCG and Charging Handle of your choice. Other that this difference both upper receivers have a 16" nitride barrel chambered in 5.56 NATO and a 1/7 rate of twist. The barrel profile is Mfg: Brownells