Handguards using the keymod accessory attachment mechanism. Keymod is a universal accessory attachment interface system that was designed to supersede the MIL-STD-1913 (Picatinny) rail system. Rails that feature the keymod accessory mounting system frequently carry a 1913 rail as well.
M-lok is a modular locking accessory mounting system that direct attaches accessories to a negative mounting space. It has been in use since 2007 and was developed by Magpul Industries as a replacement for the MOE slot system. M-lok is freely licensed to allow compatibility of accessories across different manufacturers.
Handguards in the quad rail configuration for accessory attachment.
