and disassembly of body 50 and trigger member 90 trigger member 90 includes first end 81 second end 83 inner surface 84 and outer surface 82 as best seen in fig1 and 2 first end 81 includes trigger flange 85 which is preferably curved and extends away from outer surface 82 in a substantially perpendicular direction a sufficient distance to support at least one finger of a user 39 s hand referring to fig4 and 5 first end 81 further includes guide member 86 preferred or integral with flange 85 to facilitate linear movement of trigger member 90 within channel 35 guide member 86 extends along outer surface 82 a distance sufficient to provide support and maximal linear movement of trigger member 90 through channel 35 and the opening or slot 57 in handle 55 in the preferred embodiment guide member 86 extends along outer surface 82 about one fourth to one half of the distance toward second end 83 this distance can be readily adjusted by one skilled in the art second end 83 of trigger member 90 is provided with a plunger withdrawal extension 92 which outwardly directs plunger 13 from barrel 12 when apparatus 10 is operated as.