Abstract: A projectile release mechanism is disclosed for facilitating launching of a jet-propelled projectile in the form of a spherical spin-stabilized missile. The apparatus includes a projectile support means which includes a rotary portion having a register section for receiving a unitary nozzle member which is fixed to the missile, for securing the missile to the support means. A fusible joint is formed integral with the unitary nozzle member and is disposed for heating by high-temperature exhaust gas expelled by the missile to release the missile from the rotary portion of the support means. The fusible joint comprises a peripheral ring portion of the unitary nozzle member, which is of a reduced sectional thickness. A plurality of passages are formed through the reduced ring portion for conducting the exhaust gas through the fusible joint.