i prefer ask/say ..not brand name ..but what type (schema) of trigger is best and what type of line release are suitable for choosen gun .. regardnig to strongest and solid brand name mechanism, dunno i do make the triggers myself where all details exept shaft are fiberglass and poliyetilene plastic .. it work with 120 kg load over 3 years already .. that mean all mechanism made with inox steel are solid and strong enough... but if regardings to band names it seems like neptonics and ermes-sub are exelent stuff