Brand new still in manufacturer's grease AR-15 barrel
M4 feed ramps
Marked "5.56 Nato 1-9"
Ready to drop in.
P.S. I believe this is Double Star commercial barrel. I've bought two identical barrels - and already put one onto a carbine and was able to hold 60 round 600 yard match on the black with iron sights - so they are plenty accurate.