5.56 Chrome Lined Features:

• Cold Hammer Forged 4150 (CHF) / Button Broach 4150 Chrome-Moly Vanadium Steel Barrels
• 1:7" Twist
• 5.56x45 NATO Chamber 
• Forged M4 Upper Receiver is T marked and has M4 feed ramp cuts
• Each rifle is head spaced and test fired
• 30 Round Magazine