20″ Stainless Fluted 5.56 Nato 5R Rifled 1:8 Ar15 Barrel

Premium 20″ Stainless ar15 Barrel.

• 5.56 Nato chamber (shoots 5.56 and .223)
• HBAR Profile
• 1 in 8″ Twist
• 5R Rifling 
• 416r Stainless Steel
• Rifle Length Gas
• .750 Gas Block Diameter
• M4 Feed Ramps
• 1/2-28 Barrel Threads