Mastic dispensing gun
FIG. 1 is a side elevation of a mastic dispensing gun  according to the present invention; 
     FIG. 2 is a plan view of the mastic dispensing gun  shown in FIG. 1; 
     FIG. 3 is an elevation, taken from the other side, of  the mastic dispensing gun shown in FIG. 1; 
     FIG. 4 is a front elevation of the mastic dispensing  gun shown in FIG. 1; and 
     FIG. 5 is a rear elevation of the mastic dispensing gun  shown in FIG. 1.