Sons of Liberty Gun Works M4-89 Rifle 13.7″

Sons of Liberty Gun Works designed the M4-89 to be Ultimate Fighting Rifle. It features the new SOLGW M89 Drive Lock MLOK Rail, Liberty Fighting Trigger and the Vltor A5 buffer system. Seeking to redefine the standard of Mil-Spec, SOLGW  has nothing to hide with their quality builds. This M4-89 13.7″ comes with a NOX muzzle device and is pinned and welded to bring the barrel length to 16″ OAL.

Barrel: Sons of Liberty Gun Works V2 13.7” 4150CoMOV 1:7 MPI HPT Barrel (pinned to 16″)

• Caliber: 5.56 NATO
• 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 an 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)

Lower Receiver: Sons of Liberty Gun Works Forged Lower Receiver

• Material: Made from Mil-Spec 7075-T6 aluminum forgings
• Finish: Anodized to Mil-Spec MIL-A-8625F, Type III, Class 2, Hard Anodize Coating, Flat Black Dye, Non-Reflective, NiAc Seal
• Contour is fully machined leaving no flash marks from the forging. All lowers are cut with M16 auto pocket.
• Safe, Fire, and Full Auto Pictograms.

Buffer System: Intermediate (A5) Buffer System designed to improve reliability while creating a smoother operating cycle.

• Receiver Extension: Intermediate Receiver Extension Tube made from 7075-T6 Aluminum
• Buffer: A5H2 Buffer
• Buffer Spring: SpringCo Green Rifle Length Spring
• Receiver end plate: QD Mil-Spec with properly staked Castle Nut
• Fire Control Group: Sons of Liberty Gun Works Liberty Fighting Trigger (LFT) with consistent 5.5lb pull.
• Safety Selector: Sons of Liberty Gun Works Selector
• Grip: B5 Systems Grip – Black
• Stock: B5 Systems Bravo Stock – Black

Upper Receiver:

• Material: Made from Mil-Spec 7075-T6 aluminum 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: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
• 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 Standard Mid Length Melonited Stainless Steel
• Rail System: Sons of Liberty Gun Works M89 Drive Lock
• Weight: 13 OZ
• Muzzle Device: SOLGW NOX (pinned and welded)
• Sights: No sights included

Includes: One 30rd Mags, SOLGW Sticker & Patch, copy of the US Constitution, Steel M-LOK QD Socket and LIFETIME Warranty Certificate