A system for dispensing curable material, said system comprising: a chamber defining a dispensing volume adapted to dispense the curable material through a distal outlet in communication with said dispensing volume ; a first control surface adapted to receive a primary input force from a user; a lead screw rotatably fixed relative to said first control surface with said lead screw comprising a proximal end , a distal end , external threads at least partially disposed between said proximal and distal ends , and a translation axis defined between said proximal and distal ends ; a plunger coupled to said lead screw with said plunger disposed within said dispensing volume and adapted to be advanced distally along said translation axis to compress the curable material within said dispensing volume in response to said first control surface receiving the primary input force; a locking nut comprising internal threads threadably engaging said external threads of said lead screw , and an engagement feature ; and an actuator comprising a second control surface adapted to receive a secondary input force from the user to engage said actuator and said engagement feature of said locking nut in an engaged position and disengage said actuator and said engagement feature of said locking nut in a disengaged position, characterized in that said internal threads of said locking nut and said external threads of said lead screw are configured to provide for rotation of said locking nut about said translation axis when said actuator is in said disengaged position to permit said plunger to move proximally along said translation axis and permit the compressed curable material to at least partially decompress within said dispensing volume . a chamber defining a dispensing volume adapted to dispense the curable material through a distal outlet in communication with said dispensing volume ; a first control surface adapted to receive a primary input force from a user; a lead screw rotatably fixed relative to said first control surface with said lead screw comprising a proximal end , a distal end , external threads at least partially disposed between said proximal and distal ends , and a translation axis defined between said proximal and distal ends ; a plunger coupled to said lead screw with said plunger disposed within said dispensing volume and adapted to be advanced distally along said translation axis to compress the curable material within said dispensing volume in response to said first control surface receiving the primary input force; a locking nut comprising internal threads threadably engaging said external threads of said lead screw , and an engagement feature ; and an actuator comprising a second control surface adapted to receive a secondary input force from the user to engage said actuator and said engagement feature of said locking nut in an engaged position and disengage said actuator and said engagement feature of said locking nut in a disengaged position, characterized in that said internal threads of said locking nut and said external threads of said lead screw are configured to provide for rotation of said locking nut about said translation axis when said actuator is in said disengaged position to permit said plunger to move proximally along said translation axis and permit the compressed curable material to at least partially decompress within said dispensing volume . <EOS>