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SOLD OUT! Sons of Liberty Gun Work M4-89 300 Blackout Raffle 24-087

Updated: Aug 23

The M4-89 is one of the premier fighting rifles we offer. It houses a combat grade barrel, A5 buffer system, Liberty Fighting Trigger, and B5 furniture. At Sons of Liberty Gun Works, we always tell our customers that it's not what a rifle company tells you, it’s what they don’t tell you. Below you will find the complete specifications of the M4-76. We have built our guns to run through years of hard use, and we have nothing to hide.

  • 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

  • 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)

  • Twist Rates & Thread Pitches will match caliber. Match grade firearms will have 416 Stainless Steel barrels

  • 9" 300BLK (Carbine Gas System with A2 muzzle device & Brace)

75 Chances

$35 a Chance

Good Luck, and thank you for your support!


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