16″ 5.56mm 1:7 Twist M4 4150 Barrel (Tin Coated)

• 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

• Tin Coating (Gold Titanium Nitride Finish)

Aesthetic Coating Which Improves Durability & Lubricity

• M4 Feed Ramps

• Carbine Length Gas System