16″ 5.56MM 1:7 TWIST M4 4150 BARREL (RAINBOW PVD COATED) (TIE DYE PATTERN)

• 4150 Chromoly Steel

• 5.56/.223 Chambered in 5.56×45

• 1:7 Twist

• 1/2 by 28 Thread

• M4 Contour Profile

• Markings Spiral Engraved Near Break

• .750 Gas Platform System

• Matte Rainbow PVD (Physical Vapor Deposition) (Tie Dye Pattern)

Aesthetic Coating Which Improves Durability & Lubricity

• M4 Feed Ramps

• Carbine Length Gas System