The L number in isolation is not a unique identifier; the L1 designation alone is used for a rifle and its corresponding bayonet and blank-firing attachment, a machine gun, a tank gun, a sighting telescope, an anti-riot grenade, three separate rocket systems, a necklace demolition charge, a hand-thrown flare, a fuze setter head, and two ...

The M4-L89 is the premier fighting rifle we offer. It houses our combat grade barrel, A5 buffer system, Liberty Fighting Trigger, Ambi Liberty Charging Handle, ambi Quick Selector, 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 Sons of Liberty Gun Works upper receiver is built for close-quarters combat with a maneuverable 11.5" barrel and the feature-rich L89 M-LOK handguard. The L89 rail boasts a titanium barrel nut, maximizing both strength and weight savings, and offers ample M-LOK slots and QD sling sockets for versatile accessory attachment.

The Sons of Liberty Gun Works M4-L89 5.56 AR-15 SBR is a premium rifle built from high quality parts like the cold hammer forged barrel, free float M-LOK handguard, and B5 Systems furniture. Additionally, this 11.5" short barrel rifle comes from the factory with an A2 style flash hider.

The Sons of Liberty Gun Works M4-L89BS 5.56 AR-15 is a premium rifle built from high quality parts like the cold hammer forged barrel, free float M-LOK handguard, and B5 Systems furniture. Additionally, this 14.5" rifle comes from the factory with a pinned and welded NOX9 flash hider to get the overall length to 16" as well as offering ...

The Sons of Liberty Gun Works Broadsword-89 Uppers and Drivelock (89 Series) rails provide arguably the most rigid interface on the market using traditional 2-piece AR15 construction.

These L89 Upper Receiver Groups are built using our forged upper, V2 Button rifled barrels, our V2 4140 gas block, and offered in a variety of length and muzzle device options. Our L89 rails have 7-sided MLOK, and integral QD’s for maximal available MLOK utilization. Choose from: 10.5″ 5.56mm barrel, 9.75″ rail and A2 flash hider

The Sons of Liberty Gun Works M4-L89 was designed to be Ultimate Fighting Rifle. It features their new L89 Drive Lock Rail (7 sided M-LOK slots, internal QD sling swivel socket built in to the rear of the handguard), Liberty Fighting Trigger and the Vltor A5 buffer system.

The Sons of Liberty M4-L89 Series offers the performance and precision all Sons of Liberty firearms are known for. These premium AR-platforms are available in 5.56 NATO and .300 BLK, and come in multiple barrel lengths. All M4-L89 models are equipped with a proprietary 4150CoMOV barrel with a V2 profile and a QPQ corrosion resistant finish.

Upgrade to the M4-89 13.7 Rifle with the latest advancements from Sons of Liberty Gun Works and experience the pinnacle of performance and reliability. The New M4-89 from Sons of Liberty Gunworks now includes a HUXWRX muzzle device and L89 MLOK rail.