M4-89 5.56 NATO: Key Features The M4-89 is a premium AR-15-style rifle built for hard use. Here’s what sets it apart: Barrel & Gas System. Available in 13.7” and 16” barrel lengths. Mid-length gas system for smoother cycling and reduced recoil. Nitride-treated barrel for enhanced longevity and corrosion resistance. Bolt Carrier Group (BCG)

This M89 Upper Receiver Group is built using our BROADSWORD-89 upper for that near monolithic fit, reduced rail deflection, and maximum precision – just with a more modest weight barrel than our Precision series.

The Sons of Liberty Gun Works M89 upper receiver is a great choice for your next AR-15 build. This upper has a 13.9-inch barrel constructed from CMV steel with a mid-length gas system. The barrel has a 1:7 twist rate, suitable for stabilizing a wide range of 5.56 NATO ammunition.

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.

The M4-89 is one of the At Sons of Liberty Gun Works they believe in Quality Mil-Spec or better parts. They believe there is no substitute for quality and that your gun should be built right the first time, ready for hard use right out of the box.

Sons of Liberty Gun Works, M4-89 Complete Upper, 223 Remington/556NATO, 11.5" Combat Barrel, QPQ Finish, Black, 10.5" M89 M-LOK Handguard, A2 Flash Hider

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Aug 27, 2024 · The Sons of Liberty Gun Works (SOLGW) M4-89 has emerged as a strong contender in this category, quickly gaining a reputation for its craftsmanship and dependability. In this in-depth review, we’ll examine the key features of the SOLGW M4-89, explore why it’s considered a top choice among duty rifles, and evaluate its performance in various ...

Click to Download M89 Handguard Installation Guide. The revolutionary, patent-pending Drivelock design in collaboration with Icon Defense, uses three independent wedges that interface with the angular grooves in our proprietary barrel nut.

Featuring a Titanium barrel nut, 7 sided M-LOK attachment slots, two integrated steel QD (limited rotation) sockets, and maximized cooling slots beneath the 12 o’clock rail, the L89 is built for end-users who require every little bit of mounting space they can get.