Geissele Automatics Super Modular Rail MK4 10.50" M-LOK AR-15 Handguard - Black

The Geissele Automatics Super Modular Rail MK4 is an ultra-lightweight, free-float AR-15 handguard purpose-built for Geissele's MK4 rifle platform. Constructed from aluminum and finished in Type 3 hardcoat anodized black, this 10.50" rail keeps your build slim and rigid while delivering a continuous, optics-ready top mounting surface.

M-LOK slots run along the 3, 6, and 9 o'clock positions as well as the upper 45-degree quadrants, giving you generous real estate to mount lights, lasers, grips, and other M-LOK accessories. Integrated M1913 Picatinny rail sections at the fore of the handguard allow fast, repeatable indexing of iron sights or backup optics without sacrificing a mounting position.

The MK4 Super Modular Rail installs using Geissele's proprietary barrel nut; the required Geissele barrel nut wrench is sold separately, and a gas block is not included. At 10.50" long, this handguard is an excellent fit for short-barreled MK4 upper assemblies where weight savings, accessory versatility, and a full-length top rail all matter.