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M-LOK is a modular locking accessory mounting system that is a direct attachment method for hard mounting accessories to a negative space mounting point. Designed by Magpul Industries as an evolution of the MOE slot system used since 2007, the M-LOK system is being released as a free licensed platform to allow greater compatibility of accessories between all manufacturers.
M-LOK is a modular locking accessory mounting system that is a direct attachment method for hard mounting accessories to a negative space mounting point. Designed by Magpul Industries as an evolution of the MOE slot system used since 2007, the M-LOK system is being released as a free licensed platform to allow greater compatibility of accessories between all manufacturers.
THE M-LOK BOTTOM LINE
HOW TO INSTALL M-LOK ACCESS0RIES
INSTALLATION TOOLS
7mm Box wrench
1/8 Hex Key (recommended 4 inches + clearance)
5/32 Hex Key
INSTALLATION INSTRUCTIONS
STEP 1
Install T-Nuts and Screws to the rail segment or accessory. Insert Screws through the top of the accessory and thread on the T-Nuts with the ··stem" of the nut facing up. Initial installation may be stiff due to the nylon thread patch on the Screws. If necessary, use a 7MM wrench to hold the T-Nut while turning the Screw for the initial installation.
STEP 2
Adjust the T-Nuts for mounting surface thickness. The distance between the bottom of the accessory (not the lug) and the top ··nat" of the T-Nut should be just wider than the mounting surface thickness.
STEP 3
Choose a mounting location. Your M-LOK accessory can be adjusted in 20mm increments (1/2 slot length).
STEP 4
Align the T-Nuts and insert the accessory. Rotate T-Nuts in line with the slot and insert the Lugs/T-Nuts into the slot at the desired location.
STEP 5
Ensure that the accessory is fully seated into a slot when mounting. The bottom of the accessory should sit flush with the mounting surface. If it doesn't, then slide
STEP 6
Tighten Screws. Using a 1/8” hex wrench in the screw head, push down to fully seat the Screw in the accessory, then turn clockwise to tighten. The nut should rotate 90-degrees across the slot and stop rotating, tightening down as you continue to turn. Visually confirm that the nuts are rotated, if possible. Continue tightening until the accessory is secure, but do not exceed maximum torque values. Exceeding torque values may damage the mounting surface.
INSTALLATION SPECS
INSTALL NOTE
When T-Nuts are spaced too far from the accessory, the T-Nut will rotate freely without stopping and tightening. Simply remove the accessory so that the cam engages the slot when the screw is tightened.
If the nut us spaced too close to the accessory, then the “wings” of the nut will contact the slides of the slot and nut will not rotate into place. Unscrew the nut one turn at a time and retest function
TORQUE SPECS
Maximum Installation Torque:
- Metal accessories to metal hand guards: 35 in/lbs
- Polymer or metal accessories to polymer hand guards: 15 in/lbs
- Polymer accessories to metal hand guards: 15 in/lbs
REMOVAL
To remove, simply loosen the accessory mounting screws one full turn and the T-Nuts should loosen and align with the slot to be easily removed. On some polymer mounting surfaces, the T-Nuts may embed slightly into the polymer surface when tightened. When removing from polymer surfaces, easiest function is obtained by loosening 1/2 turn or so and then pressing down on the head of the screw with the hex wrench. This will free the T-Nut if it has been over tightened, and you may remove normally after this step.