Multiple Manufacturers AR-15 Upper Receiver Assembly 16" (Gas Piston) with SIG SAUER ROMEO5
This complete AR-15 upper receiver is ready to pair with a compatible lower to finish an AR build. It has a 16" barrel and uses a gas piston operating system to help keep fouling out of the receiver.
This unit includes a SIG SAUER ROMEO5 red dot (mounted), bolt carrier group (BCG), and charging handle.

