Ghost Firearms 16" 5.56 Complete Barrel Assembly 

• 4150 Chromoly Steel
• M4 Contour Profile
• M4 Feed Ramps
• 5.56/.223 Chambered in 5.56x45mm
• Markings Spiral Engraved Near Break
• Carbine Length Gas System 
• 1:7  or 1:8 Twist
• .750 Gas Platform System
• 1/2 x 28 Thread
• Made in the USA
• .750 Low Profile Gas Block
• Stainless Steel Carbine Gas Tube
• Axe Brake with Crush Washer