page_title: M-LOK
hierarchical_section_title: M-LOK
caption_attribution_description: English: Magpul MOE M-LOK handguard on a privately assembled AR-15 semi-automatic rifle. Rifle specifications: BCM upper Stag Arms Stag-15 lower receiver Bravo Company Standard 16" mid-length upper receiver B5 Systems Bravo SOPMOD stock Bravo Company bolt carrier group DPMS carry handle Magpul MOE handguard Weight: 7.11&#160;lb (3.23&#160;kg) (without magazine)
context_page_description: M-LOK, standing for Modular Lock, is a free licensed firearm rail interface system developed and patented by Magpul Industries.
  M-LOK allows for direct accessory attachment onto the "negative space" mounting points, and is a competing standard to VLTOR's open sourced KeyMod system for replacing the ubiquitous Picatinny rail in some applications. Compared to the Picatinny rail system, both M-LOK and KeyMod enable the user to have a slimmer, lighter, smoother and more fenestrated handguard/fore-end with accessories mounted only where needed, whereas a Picatinny handguards typically will have rail slots for its whole length resulting in a heavier and bulkier handguard with sharp edges and poorer barrel ventilation.
  The M-LOK system can be seen as an evolution of the Magpul Original Equipment system, but the two are not fully compatible. Though newer M-LOK accessories can be used on older MOE slot handguards if an adaptor plate is used, there is no adaptor available for using older MOE accessories on the newer M-LOK handguards.
context_section_description: M-LOK, standing for Modular Lock,  is a free licensed firearm rail interface system developed and patented by Magpul Industries.
  M-LOK allows for direct accessory attachment onto the "negative space" (hollow slot) mounting points, and is a competing standard to VLTOR's open sourced KeyMod system for replacing the ubiquitous Picatinny rail in some applications.  Compared to the Picatinny rail system, both M-LOK and KeyMod enable the user to have a slimmer, lighter, smoother and more fenestrated handguard/fore-end with accessories mounted only where needed, whereas a Picatinny handguards typically will have rail slots for its whole length resulting in a heavier and bulkier handguard with sharp edges and poorer barrel ventilation.
  The M-LOK system can be seen as an evolution of the Magpul Original Equipment (MOE) system, but the two are not fully compatible.  Though newer M-LOK accessories can be used on older MOE slot handguards if an adaptor plate is used, there is no adaptor available for using older MOE accessories on the newer M-LOK handguards.
caption: Magpul MOE handguard on a user-assembled AR-15 semi-automatic rifle
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