Abstract: A device comprises of independent trigger bow (58) supplied with overlapping recess (64) and a trigger block (10) having a bow guide recess (20), pivot hole (14) with axis pin (34A), primary lever (28) having a axis hole (30) at one end and a bow extender recess (32) and a trigger plate (36A) having a pre-load bar (56) and stopper bar (54) that can be assembled into a module to allow easy installation on trigger tunnel (85) of firearm(88) for reduce firearm trigger pull weight without altering firearm (88). Block (10) is being equipped with catches (12) extending sideways and adjacent with bow guide recess (20) which will overlap with recess (64) of bow (58) to allow both the bow (58) and block (10) to occupy in one same area which allow anchoring against a bow tunnel (83) end wall and supplied with magazine cut (15) disposed on the upper left of block (10) to allow for a magazine passage.

Abstract: An elongated base bar comprising an auxiliary sight base bar having an upper surface, a forward end a rearward end, used for mounting two optical sights on a firearm, a telescope sight combined with a day/night sight or a laser sight. The rearward end being rigidly attached to the forward end of the elongated base bar, having an upper sight receiving portion, clamping guide on the upper sight receiving portion, a lower mounting portion, see-through center hole having an axis parallel to the longitudinal axis of the elongated base bar and located between the upper sight receiving portion and the lower mounting portion, a self-aligning v-guide and a threaded mounting hole on the lower mounting portion for mounting on a firearm.