Barrel is a DPMS 16" barrel that was turned down from a heavy barrel. Comes with a low profile YHM steel gas block and A2 flash hider. After the barrel was turned down it was Cerakoted in graphite black. It comes with an A2 flash hider. It is 1 in 9 twist and chambered for 5.56 so you can shoot milspec ammo in it as well as 223 with out a worry. It has been pretty accurate for me. Round count is between 1-2k. Asking $130 Carrier is a complete Rock River Arms. I have put about 150 rounds on this guy. Purchase brand new. Works like a charm, no issues. Asking $110. ***SOLD*** I am located on the west side of portland.