FAB Defense Offset M-LOK Picatinny Rail, 4-Slot

The FAB Defense Offset M-LOK Picatinny Rail (FAB Defense part no. FXMA1B) is a compact, four-slot Picatinny rail section built to mount at an angle on M-LOK handguards. Made by FAB Defense, this offset rail gives shooters a mounting point for a flip-up sight, light, or laser positioned away from the top rail, keeping the sight picture clear and accessories easy to reach. It is a simple, affordable way to add mounting real estate to any M-LOK-equipped rifle or shotgun handguard.

Key Specifications

• Provides 4 slots of Picatinny rail space.
• Mounts to M-LOK handguards in an offset, angled position.
• Keeps accessories like lights or lasers clear of the top rail sight picture.
• Compact size adds minimal bulk to the handguard profile.
• Works on both rifle and shotgun handguards using the M-LOK standard.

Frequently Asked Questions

What does this rail section attach to? It mounts directly to M-LOK handguard slots.

What is it used for? It adds an offset Picatinny mounting point for accessories like lights, lasers, or flip-up sights.

Buy the FAB Defense Offset M-LOK Picatinny Rail, 4-Slot

Add offset mounting space for your favorite accessories. Order this rail section from our Lubbock, Texas gun shop for fast, insured shipping, and see our full scope accessories selection for more mounting options.