ET Arms OMEGA-15 Semi-Automatic 5.56x45mm AR-15 Rifle, 16\" 1:8 Barrel, M4 Stock, 10\" M-LOK Handguard, 60 Round Magazine - ETAGOM556ML1060: This AR-15 Rifle from ET Arms has a 16\" barrel chambered in 5.56NATO with a 1/2x28 thread pitch flash hider. It features a 10\" MLOK handguard giving you the real estate needed to mount any MLOK accessories you so desire. It also comes complete with 6 position adjustable stock giving you many options for the length of pull that best fits you. This rifle ships with one 30 Round Magazine and an additional 60 Round Magazine. All this rifle needs is an optic or sighting system and you will be ready to rock out of box.