Optimum Performance at a Lower Price: The E1 touches the fine points of Dangerous Power"s accomplishments and performance. The E1"s strengthened core is constructed of our distinguished & popular "Dump-Valve System" & is equipped with a micro-switch board capable of firing in Semi-auto mode & Full-auto fire modes capped at 25 bps. * High Presure Regulator: The E1"s high pressure regulator is composed of the G3"s highly accurate OPR system & internals. The E1"s OPR"s operation is service-friendly & easy to maintain. * Dump Valve Bolt System: The E1"s Dump Valve system is one of the finest and very efficient firing systems for Dangerous Power"s spool valve markers. Maintenance for the fire assembly is simple & is constructed of 2 moving parts. The E1"s fire assembly and operation proceeds from the G3"s heritage, DP"s greatest achievement.