MC1-1B; P/N 11-1-900-1, NSN 1670-00-598-0751 

MC1-1C; P/N 11-1-900-2, NSN 1670-01-262-2359 

MC1-1D; P/N 11-1-900-3, NSN 1670-01-487-0777 

MC1-1E; P/N 11-1-900-4, NSN 1670-01-499-6573 

The MC1 series troop back personnel parachute provides a capability to safely deliver an airborne soldier and individual equipment from an aircraft in flight for a vertical assault on the enemy. 

The MC1-1B maneuverable parachute assembly is used primarily for a premeditated jump when a precision landing in a small target area is necessary. The basic canopy is the same as the T-10B assembly, except that there are orifices or cutout areas in eleven (11) of the thirty (30) gores, creating a gliding type descent. The canopy has two (2) control lines, each extending from an outboard orifice to toggles which may be manipulated in such a way as to make 360° turns. It has a 3-3/4 inches mesh anti-inversion net attached to the skirt of the canopy that extends 18 inches below the canopy shirt. When packed for service, the complete assembly weighs approximately 29 lbs, and has a nominal diameter of 35 feet and a projected or inflated diameter of 24-1/2 feet. 

The MC1-1C maneuverable parachute assembly designed from the basic MC1-1B canopy is used primarily for a premeditated jump when a precision soft landing in a small target area is necessary. The basic canopy is the same as the MC1-1B drawing changes as noted are incorporated.
These changes create a fast opening canopy with a gliding type descent rate of approximately 4 to 5 feet per second, with more steerable.