Factory NIC POF 223 9.25 SBR.
NIB POF USA 9.25" complete SBR chambered in .223 / 5.56. This gas piston upper is full auto regulated with a modular railed receiver (MRR). The barrel is heavy contoured and fluted.

This lower is also registered in 223/5.56/6.5/6.8/9mm so choose your upper if you like