Sons of Liberty Gun Works M4 Patrol SL 5.56 AR-15 Upper Receiver

The Patrol SL Upper Receiver Group is their entry level carbine build. It is built with Hidden high quality components. At Sons of Liberty Gun Works they always tell our customers, it’s not what a rifle company tells you, it’s what they don’t tell you. Below you will find the complete specifications on the Patrol Upper. They have built our guns to run through years of hard use, and they have nothing to hide.

Specifications:

• Barrel: Sons of Liberty Gun Works 4150CoMOV 1:7 MPI HPT Barrel
• Caliber: 5.56 NATO Chamber
• 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
• Gas Block: .750″ Gas Block Journal with appropriately sized gas port
• Barrel Finish: QPQ Corrosion Resistant Finish
• Barrel Extension: QPQ coated M4 Feed Ramp Extension
• High Pressure (proof) Tested (HPT)
• Magnetic Particle Inspected (MPI)
• With “F” marked Front Sight Block

Upper Receiver:

• Material: Made from Mil-Spec 7075-T6 aluminum Cerra Forge forgings.
• Exterior Finish: Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodic Coating, Flat Black Dye, Non-Reflective, NiAc Seal
• Interior Finish: Dry Film Lube
• T-Marks: Engraved T-Marks
• Gas Block: “F” marked steel Front Sight Block, taper pinned to barrel per mil-spec.
• Gas Tube: Sons of Liberty Standard Carbine Melonited
• Handguard: Magpul SL, Black
• Muzzle Device:
  • 10.5" / 16": Mil-Spec A2 Flash Hider
  • 13.7": SOLGW NOX
• Sights: Midwest Combat Rear Sight