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sons of liberty gun works
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U-M4L89-556-115-A2-SOLGW
657628672975
U-M4L89-556-115-A2
The Sons of Liberty Gun Works M4-L89 Barreled Upper is a professional-grade, short-barreled upper receiver group optimized for reliability and zero retention. Built on a Mil-Spec 7075-T6 forged upper receiver, it features an 11.5-inch Liberty Fighting Barrel with a carbine-length gas system, a combination favored for its balanced dwell time and consistent cycling in 5.56 NATO. The defining feature is the L89 Drivelock handguard, which utilizes a titanium barrel nut and a specialized locking system to provide a rock-solid mounting platform that prevents rail rotation and ensures lasers or iron sights maintain a precise zero. This assembly comes ready for suppressed or unsuppressed duty use, capped with a standard A2 flash hider.
