Abstract: A self-separating sabot-projectile assembly with a positive engaging attachment to eliminate rotational slippage between the sabot and projectile. The torque transmitting interface between the sabot and projectile consists of a geometric shaped depression in the rearward end surface of the projectile which mates with a matched projection of the sabot. The sabot projection is hollowed out to allow the charge pressure to aid in the engagement of the sabot and projectile.

Abstract: A cryogenic dispensing system has a cartridge containing a cryogenic material of limited dose and a housing to hold and dispense the cryogenic material at a controlled flow rate. The housing has a hollow interior and has an inlet opening adapted to receive a cartridge containing a cryogenic material and an outlet opening adapted to deliver cryogenic material from the interior to a wart, other tissue to be treated or the like. The hollow interior of the housing has an intermediate portion adapted to receive the insert member which has an engineered flow path therethrough and a method of starting the flow, where when opened, places the inlet in fluid communication through the flow path with the outlet. Preferably, the system includes a cartridge which contains liquid CO2. A masking ring may also be provided downstream of the flow path for applications of CO2 to selected dermatological areas such as a wart or the like.