A pistol grip style attachment for use with a paintbrush having an extending handle, the attachment including a body having a configured gripping surface, with a channel defined in the body adapted to receive the handle. A clamping member is displaceable within the body in order to engage an underside location of the handle. In one embodiment, the body includes first and second assembleable halves, each further exhibiting a reinforced ribbed interior. A passageway communicates the channel defined between the assembleable halves with a bottom location of the body for seating the clamping member in a limited displaceable fashion.