Smyth Busters: M-LOK vs. KeyMod - Which is Better?

Published on April 13, 2021
Duration: 4:36

This video compares M-LOK and KeyMod accessory mounting systems for AR-15 platforms. M-LOK utilizes T-nuts in rectangular slots, locking via a 90-degree rotation, while KeyMod uses keyhole slots for a slide-and-fasten method. Both are lighter and lower profile than Picatinny rails. M-LOK is generally considered sturdier, especially for maintaining accessory zero, and has seen wider adoption due to SOCOM testing and increased accessory availability.

Quick Summary

M-LOK uses T-nuts in rectangular slots that rotate 90 degrees to lock, while KeyMod uses keyhole slots where accessories slide into a narrow section and are then fastened. Both offer lower profile and less weight than Picatinny rails, with M-LOK generally considered sturdier, especially for maintaining accessory zero.

Chapters

  1. 00:00Intro: M-LOK vs. KeyMod Debate
  2. 00:20How M-LOK Works
  3. 00:47How KeyMod Works
  4. 01:18Advantages Over Picatinny
  5. 02:01Strength & SOCOM Testing
  6. 03:08Military Adoption & Popularity

Frequently Asked Questions

What is the main difference between M-LOK and KeyMod accessory mounting systems?

M-LOK uses T-nuts in rectangular slots that rotate 90 degrees to lock, while KeyMod uses keyhole slots where accessories slide into a narrow section and are then fastened.

Are M-LOK and KeyMod better than Picatinny rails?

Yes, both M-LOK and KeyMod are generally considered superior to Picatinny rails because they offer a lower profile and reduced weight by removing unnecessary material.

Which mounting system, M-LOK or KeyMod, is considered stronger?

M-LOK is generally considered the sturdier system, especially for maintaining zero on accessories like bipods, a conclusion supported by SOCOM testing.

Why is M-LOK more popular than KeyMod?

M-LOK's popularity surged after SOCOM adopted it. This led to a wider variety of accessories being developed for M-LOK compared to KeyMod.

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