The 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 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. * Fire assembly and operation proceeds from the G3"s heritage, DP"s greatest achievement. * Length = 15.38 inches * Height = 7.58 inches