Sons of Liberty Gun Works L89A Drive Lock ARCA M-LOK Handguard - 6.75"

The SOLGW L89 ARCA handguard with integrated ARCA Swiss rail and RRS-Lock compatibility — built on the DriveLock lockup system that makes POI shifts from accessory loading a non-issue. The Sons of Liberty Gun Works L89 ARCA 16.75-inch M-LOK handguard installs with a titanium barrel nut, anti-rotation tabs, and an internal dowel pin between the upper and rail for a rigid, repeatable lockup that minimizes point-of-impact shifts for lasers and other VAS equipment attached to the handguard.

The integrated full-length ARCA Swiss rail with RRS-Lock system adds a critical precision capability. The ARCA rail runs the full length of the handguard bottom, providing a continuous mounting track for ARCA-equipped tripods, bipods, and shooting bags without clamping adapters. The RRS-Lock system from Really Right Stuff allows rapid full-length positioning along the rail while engaging a positive lock for rock-solid positional security — eliminating the trade-off between adjustment speed and mounting stability that conventional ARCA clamps require.

The Sons of Liberty Gun Works L89 ARCA is a 16.75-inch M-LOK free-float AR-15 handguard built on the DriveLock barrel nut system with a titanium barrel nut, 7-sided M-LOK slots, two integrated steel QD (limited rotation) sockets, and a Mil-Spec hard anodize finish, designed for duty and precision rifle applications requiring rigid lockup and maximum accessory mounting. Features an integrated full-length ARCA Swiss rail with RRS-Lock compatibility.

Four features define the L89's advantage for duty and precision builds. The DriveLock barrel nut system — with anti-rotation tabs and an internal dowel pin between the upper receiver and rail — provides the rigid, repeatable lockup that minimizes point-of-impact shifts when accessories are loaded on the handguard, critical for builds running laser aiming systems where the laser's zero must hold across thousands of rounds and heavy accessory loads. The titanium barrel nut reduces weight at the barrel nut while maintaining the structural integrity required for the DriveLock's torque specifications. Seven-sided M-LOK slots provide direct accessory attachment with positive registration, and fast slots beneath the 12 o'clock rail accommodate zip ties and MIL-SPEC cord for clean cable management. Two integrated steel QD (limited rotation) sockets on the handguard provide sling attachment at fixed positions without external QD adapter hardware.

Compatible with mil-spec AR-15 upper receivers. 16.75-inch length. Includes L89 rail, titanium barrel nut, barrel nut wrench, and lock-up components.

Mil-Spec MIL-A-8625F Type III Class 2 hard anodized, non-reflective NiAc seal finish. Engraved T-Marks. Titanium barrel nut. Made by SOLGW.

Built for duty AR-15 builds, precision rifle configurations, and any M-LOK handguard application where rigid DriveLock lockup and maximum accessory mounting space are the priorities.

By Sons of Liberty Gun Works. Includes rail, titanium barrel nut, barrel nut wrench, and lock-up components. Standard SOLGW warranty applies.