Out of stock
SKU: SOLGWLRF-L89BS-137-XL
UPC: 669185246636
MPN: LRF-L89BS-13.7-XL
The Sons of Liberty Gun Works M4 L89 BS 5.56 NATO 13.7" rifle represents purpose-built tactical engineering for professional end-users who demand reliability in high-stress environments. This platform is engineered for law enforcement, military, and serious civilian operators who require a compact, combat-ready carbine without sacrificing accuracy or durability. The 13.7" barrel length positions this rifle in the optimal efficiency zone for 5.56 NATO—delivering reliable velocity while maintaining a handling package that excels in confined spaces, vehicle operations, and room-clearing scenarios.
Sons of Liberty Gun Works builds this M4 L89 with proven Mil-Spec components and proprietary quality standards refined through direct feedback from active operators. The "BS" designation indicates a billet-style upper and lower receiver construction, which provides superior material control and tighter tolerances compared to standard forging methods. At 12.13 lbs, the rifle achieves a balanced weight-to-capability ratio that reduces shooter fatigue during extended operations while maintaining the structural integrity required for sustained fire and accessory mounting. The 5.56 NATO chambering ensures compatibility with the most widely available ammunition platform across military, law enforcement, and civilian markets, eliminating logistics complications in the field.
This rifle benefits operators who prioritize maneuverability in tactical environments—including close-quarters battle, vehicle egress, and transitional spaces where full-length carbines prove unwieldy. The 13.7" configuration delivers sufficient dwell time and gas tube velocity for reliable cycling with both standard and barrier-defeat ammunition, while the modular design accommodates optics, suppressors, lights, and rail-mounted systems that professional users require. Installation of accessories follows standard mil-spec picatinny and quick-detach conventions, making this platform immediately compatible with existing tactical equipment inventories.
WARNING ⚠️ You must be 18 or older to purchase shotgun or rifle ammunition and 21 or older to purchase handgun ammunition and firearms. Please reference our requirements for ammunition orders to "restricted" states HERE. Always make sure you use the correct ammunition for your firearms. Ammo cannot be shipped to a PO Box. Please reference state & local laws before making a firearm or ammunition purchase.
