Geissele 16.5" M-LOK/Arca-Swiss MK18 Black Super Modular Rail 05-791B

Geissele 16.5" M-LOK/Arca-Swiss MK18 Black Super Modular Rail 05-791B is the latest in Geissele's line of Super Modular rails, specifically made to interface with the Arca-Swiss Quick Release System. Based on the MK16 M-LOK Super Modular Rail, this Geissele MK18 Rail offers a small diameter and overall height, creating a slim profile built for competition shooters.

The flat base of this Geissele Arca handguard features an "Arca-Style" 35mm wide form with a 45-degree dovetail, allowing quick mounting to an Arca-Swiss Quick Release mounting base. The rifle and tripod can slide into any position along the rail rather than being locked to a single fixed point. This Geissele MK18 handguard features Geissele's proprietary 2.25" barrel nut that interfaces with the receiver, creating a platform that stays straight and true across the entire length of the free-float rail.

3D precision machined from 7000-series aluminum, this Geissele Arca Rail uses Magpul's M-LOK technology at the major 3 quadrants - left, right, and bottom - plus the upper 45s, giving it real modularity for competition accessory setups.

Key Features:

• Length: 16.5 inches
• Attachment System: M-LOK
• Arca-Swiss Interface: 35mm wide, 45° dovetail
• Material: 7000 series aluminum
• Finish: Type 3 hardcoat anodized black
• Weight: Approximately 17 oz (18.4 oz with barrel nut)
• Inner Diameter: 1.26 inches
• Outer Diameter (DAQ): 1.59 inches
• Barrel Nut: Proprietary 2.25" length for secure interface
• Compatibility: Mil-spec AR-15 pattern rifles

This Geissele SMR rail hands competition shooters direct tripod compatibility without needing a separate Arca adapter bolted onto the handguard.