An experimental “barefoot boot” was developed, it was used by MACV / SOG (Military Assistance Command, Vietnam – Studies and Observations) because Communist trackers would come running whenever they discovered U.S. jungle boot tracks. These were not widely used.
The Gyrojet is a family of unique firearms developed in the 1960s named for the method of gyroscopically stabilizing its projectiles. Rather than inert bullets, Gyrojets fire small rockets called Microjets which have little recoil and do not require a heavy barrel or chamber to resist the pressure of the combustion gases. Velocity on leaving the tube was very low, but increased to around 1,250 feet per second at 30 feet. The result is a very lightweight & transportable weapon.
The McGuire rig was the method used to extract a team by rope when the extraction helicopter could not descend low enough to either sit down, low hover, or utilize its two 35’ ladders. If the helicopter could descend down to at least 100 feet altitude above the team, McGuire rigs were dropped to the team and they were extracted by rope.
A McGuire rig was simply a 15’ x 3” nylon strap (type A7A) fashioned into a loop large enough for a man to sit in and with a smaller wrist loop sewn into the A7A strap to prevent the wounded or unconscious from falling out. The top of the A7A strap was tied to the outside (running) end of a 120 foot ½ inch nylon rope and stowed on the left side of the helicopter inside a Griswold container (a thick canvas weapons container).
Project Delta’s Sergeant Major Charles T. McGuire – renown for the McGuire rig used to extract recon teams.