Jefftron Leviathan NGRS Optical to StockOne of the best Mosfets for NGRS builds! The Leviathan NGRS optical is one of the most advanced ETU (electronic trigger unit) on the market It combines optical and switch sensors for better handling and durability Built in wireless communication for quick setup using iOS or Android smartphones! Tactile trigger switch has travel only 0,13mm long for ultimate hair trigger feeling Unique Real feel trigger system (RFTS) with integrated spring simulates