ELG stands for 'Enhanced Longitudinal Grind'. Our new lower parts kits have set the standard when it comes to out-of-the-box mil-spec performance for Original Equipment Manufacturers. Now we're moving them to the wholesale and retail markets.At the heart of this kit stands the longitudinally-ground trigger, which is ground in-line with the direction of pull along the long axis of the trigger, and then finish-polished. This grind and polish provide two significant advantages over standard mil-spec kits: A smoother pull with reduced grittiness An enhanced basis for performing a trigger job