Ghost Firearms AR-15 16" 300 Blackout Barrel 

• 4150 Chromoly Steel
• Light HBar Profile
• M4 Feed Ramps
• 300 Blackout (7.62x35)
• Markings Spiral Engraved Near Break
• Pistol Length Gas System 
• 1:8 Twist
• .750 Gas Platform System
• Black Nitride Coating
• 5/8 by 24 Thread
• Made in the USA