Sons of Liberty Gun Works M4-89 5.56 AR-15 Rifle - 13.7" (Pinned)

The M4-89 is Sons of Liberty's premier fighting rifle, featuring a 13.7 combat grade barrel, Pin and Welded Nox Muzzle Device, A5 buffer system, Liberty Fighting Trigger, and B5 furniture. At Sons of Liberty Gun Works they always tell their customers, its not what a rifle company tells you, it's what they don't tell you. Below you will find the complete specifications on the M4-89. They have built their guns to run through years of hard use, and they have nothing to hide. Upper Features & Specifications: Material: Made from Mil-Spec 7075-T6 aluminum Cerra Forge forgings. Finish: Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodic Coating, Flat Black Dye, Non-Reflective, NiAc Seal T-Marks: Engraved T-Marks Charging Handle: Liberty Charging Handle Gas Block: Sons of Liberty Lo-Pro Gas block made from 4140 Steel and Nitride Treated with Knurled Head Set Screws Gas Tube: Sons of Liberty Mid Length Melonited Stainless Steel Lower Receiver Features & Specifications: Lower Recei