Rob Allen Vecta 2 Speargun Trigger MechanismThe Rob Allen Vecta Mechanism is molded from PA6 30% GS glass filled Polyamide to handle the power needed to hunt large bluewater fish. External shrouds and an internal barrel spigot increase strength at the critical barrel mechanism interface. Apart from safety considerations, any flex in this area reduces accuracy. Internal webs at several places in the mechanism are designed to spread loading away from high stress areas. All load bearing pivot pins