Sons of Liberty Gun Works M4-89 5.56 AR-15 Upper - 13.7"

Specifications:

• Handguard Length: 13"
• Barrel: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel
• Barrel Steel: 4150 CrMoV (Chrome Moly Vanadium per MIL-B-11595E)
• Twist Rate: 1/7 Twist Six Groove
• Thread Pitch: 1/2-28 Threaded Muzzle
• Muzzle Device: NOX Keymo Muzzle Device
• Gas Block: .750″ Gas Block Journal with appropriately sized gas port
• Gas Length: Mid
• Barrel Finish: QPQ Corrosion Resistant Finish
• Barrel Extension: QPQ coated M4 Feed Ramp Extension
• High Pressure (proof) Tested (HPT)
• Magnetic Particle Inspected (MPI)
• Weight: 3 lbs 6.6 oz

Please NOTE: Bolt carrier group and charging handle is not included. This upper is pinned.