A biomaterial delivery system comprising: a dispenser device for dispensing biomaterial(s) to a desired target site, the dispenser device being a delivery gun and including an actuator operable for actuating the dispenser device the dispenser device adapted to be in fluid communication with a reservoir comprising the biomaterial(s); wherein the reservoir comprises a cartridge for containing the biomaterial(s), the cartridge having proximal and distal ends ; wherein the actuator comprises an actuation trigger ; and wherein a housing of the delivery gun pivotally supports the actuation trigger which is operable to advance a plunger drive mechanism in order to release the biomaterial(s) from the cartridge; a mixer device externally attachable to the reservoir for mixing the biomaterial(s) and any activator that may be required; and a conduit attachable to the mixer for transferring the biomaterial(s) from the mixer to the desired target site, wherein the conduit comprises sheath , sheath adaptor , and a cannulated fracture fixation device , the cannulated fracture fixation device comprising an orthopaedic screw, nail, or pin, wherein the cartridge comprises two or more chambers for containing the biomaterial(s) and activator component(s) separately from each other until required at the site of the surgery, wherein the distal end of the cartridge comprises feeding channels that are in fluid communication with the mixer , and wherein the number of channels corresponds with the number of chambers included in the cartridge of a particular embodiment of the device so that each chamber has its own channel in fluid communication with the mixer . a dispenser device for dispensing biomaterial(s) to a desired target site, the dispenser device being a delivery gun and including an actuator operable for actuating the dispenser device the dispenser device adapted to be in fluid communication with a reservoir comprising the biomaterial(s); wherein the reservoir comprises a cartridge for containing the biomaterial(s), the cartridge having proximal and distal ends ; wherein the actuator comprises an actuation trigger ; and wherein a housing of the delivery gun pivotally supports the actuation trigger which is operable to advance a plunger drive mechanism in order to release the biomaterial(s) from the cartridge; wherein the reservoir comprises a cartridge for containing the biomaterial(s), the cartridge having proximal and distal ends ; wherein the actuator comprises an actuation trigger ; and wherein a housing of the delivery gun pivotally supports the actuation trigger which is operable to advance a plunger drive mechanism in order to release the biomaterial(s) from the cartridge; a mixer device externally attachable to the reservoir for mixing the biomaterial(s) and any activator that may be required; and a conduit attachable to the mixer for transferring the biomaterial(s) from the mixer to the desired target site, wherein the conduit comprises sheath , sheath adaptor , and a cannulated fracture fixation device , the cannulated fracture fixation device comprising an orthopaedic screw, nail, or pin, wherein the cartridge comprises two or more chambers for containing the biomaterial(s) and activator component(s) separately from each other until required at the site of the surgery, wherein the distal end of the cartridge comprises feeding channels that are in fluid communication with the mixer , and wherein the number of channels corresponds with the number of chambers included in the cartridge of a particular embodiment of the device so that each chamber has its own channel in fluid communication with the mixer . <EOS>