FAB Defense FX-MA1B Offset M-LOK Polymer Picatinny Accessory Rail 4-Slot

The FAB Defense FX-MA1B is a compact offset Picatinny accessory rail designed to mount directly to any M-LOK compatible handguard. Built from durable polymer, this rail section provides a short 4-slot 1913 Picatinny platform set at an offset angle to the host handguard, giving shooters a convenient location for weapon lights, lasers, pressure switches or other accessories without crowding the main top rail.

The FX-MA1B installs using standard M-LOK hardware and locks securely into M-LOK slots on modern AR-platform and other M-LOK equipped handguards. At roughly 84 mm long and weighing only 21 grams, the lightweight polymer construction adds virtually no bulk to the rifle. The offset orientation keeps mounted accessories close at hand and clear of the primary optic, offering a simple and cost-effective way to expand a rifle's accessory mounting options.