Abstract: A firearm having a receiver housing an action-cycling mechanism, a barrel having a muzzle opening on a distal end, a shroud coaxially surrounding at least a portion of the barrel, the shroud having a distal portion extending beyond the muzzle opening defining a shroud front region having a distal end portion, a proximal portion extending proximally from the muzzle opening defining an annular region between the barrel and shroud, a front wall disposed at the distal end portion of the shroud, the front wall having an opening to allow passage of a projectile fired from the gun barrel, a firewall disposed in the annular region of the proximal portion of the shroud, the firewall moveable relative to the gun barrel between a forward, at-rest position, and a rearward, compressed position, the firewall mechanically engaged with the action cycling mechanism, and heat-dissipating fins in the annular region extending longitudinally along, and radially outward from, the gun barrel to the shroud, the fins defining channel

Abstract: A method for facilitating the distribution of physical restricted securities to a set of participants comprises receiving from an originating entity, such as a venture capitalist, a distribution package. A transfer agent is given temporary custody of the restricted securities and delivery instructions are provided to the transfer agent. Because the transfer agent has custody of the securities while they are still in the name of the originating entity, it can perform distributions of the restricted securities in accordance with incrementally delivered instructions and does not need to terminate the entire distribution if the instructions for a particular participant are incomplete or inconsistent. A system for gathering distribution instructions from participants and delivering the instructions to a facilitator is also disclosed.