are fastened thereto by fasteners 111 113 the trigger 24 includes a contoured front grasping surface 130 that facilitates a user 39 s gripping a safety or trigger lock 26 is provided to prevent unintended operation of the trigger 24 and the dispenser 10 as shown best in fig3 a slot 132 is formed in the trigger and particularly in the front surface 130 and is adapted to receive the safety 26 this slot 132 preferably extends through to the rear face 134 of the trigger preferably the slot 132 extends to a location of about two thirds the longitudinal extent of the trigger 24 a user may grasp both the safety 26 and the trigger 24 with the fingers of one hand in such a configuration so that at least two of the user 39 s fingers may grasp and actuate the safety 26 while at least two of the user 39 s fingers may grasp and actuate the trigger 24 in this manner a user can easily grasp and actuate the dispenser 10 with only one hand the safety 26 has a contoured outer surface 138 located on its leading face a catch 54 a pair of pivot ears 140 a groove 142 and an arm 144 the catch arm 54.