The Geissele Super Modular Rail MK8 M-LOK Handguard, 15 Inch, AR15/M16/M4, Black (Geissele part number 05-286B) is designed to give the user full modularity while maintaining a strong and rigid platform for AR15, M16, and M4-pattern rifles. Geissele built the SMR MK8 around a proprietary 2-inch-long barrel nut, which spreads clamping force over more of the barrel’s shank than a standard nut for a stiffer, more consistent mount. At a full 15 inches, the handguard gives builders extensive M-LOK real estate for lights, grips, and rail sections along nearly the entire length of a standard carbine-length gas system build.

Key Specifications

• Overall length is 15 inches, sized for full-length rail coverage.
• Compatible with AR15, M16, and M4 pattern rifles.
• Uses the M-LOK attachment system for direct accessory mounting.
• Built around Geissele’s proprietary 2-inch-long barrel nut for a stiffer, more consistent mount.
• Constructed from aluminum, finished in black.

Frequently Asked Questions

What platforms fit this handguard? AR15, M16, and M4 pattern rifles.

What’s special about the barrel nut? Geissele’s proprietary 2-inch-long barrel nut spreads clamping force over more of the barrel shank, giving a stiffer, more consistent mount than a standard nut.

What attachment system does this rail use? M-LOK, for direct mounting of accessories without a separate rail adapter.

Buy the Geissele Super Modular Rail MK8 M-LOK Handguard, 15 Inch, AR15/M16/M4, Black

Order it from our Lubbock, Texas gun shop for a rigid, full-length M-LOK handguard on your AR build. Shop more Geissele Automatics parts in our AR handguards category.