The ModButton Lite from Modlite Systems® is a small remote activation switch with big features. Built into an impact-resistant polymer housing, the ModButton Lite clamps onto in-spec M1913 Picatinny rails for a solid and consistent switch placement. An adapter for MLOK rails is sold separately.
This variant will work with the L-3 NGAL (LA-23/PEQ).
Note on cable length options: For almost all use cases the 4.5″ variant is what you want to buy. Unless you have a special setup the 4.5″ cable is going to be plenty even running a laser.