The L89 Series of M4s represents SOLGW’s uncompromising commitment to the professional end user. Built on precision-forged upper and lower receivers, these rifles feature the purpose-built L89 Drivelock Handguard system with 7-sided MLOK slots and integral steel QD cups on both sides. We’ve equipped these with extended steel barrel nuts for a more rigid lockup, and the SOLGW Liberty Fighting Barrel that delivers accuracy when it matters most. The enhanced A5 Length Buffer System provides superior recoil management and includes premium components such as the renowned Bolt Carrier Group, Liberty Charging Handle, Liberty 2-Stage Trigger, and an ambidextrous selector. Comes standard with SB Tactical brace and B5 grip.