The Colt 41-A pulse rifle is a 10mm pulse action automatic rifle, which has
been adopted to be the marines standard personal issue weapon. The rifle has
an over-and-under configuration that also comprises of a 30mm pump action
grenade launcher. A spring loaded retractable stock allows the weapon to be
used in a Carbine format (with the stock retracted) or as a standard rifle, with
the stock extended for a greater stability when the person is firing from the
shoulder. 

The standard ammunition is a M309 10mm X 24
round. The ammunition is caseless and has a high
explosive tipped with light armor piercing capabilities.
It is designed to puncture personal armor, exploding
just after the impact to inflict massive internal
damage to the target. Due to the efficiency of the ammunition, the round is nearly all warhead, making
it very compact. The ammunition clip will hold up to 100 M309 rounds in a 'N' bend conveyor, which
feeds the rounds mechanically into the breech. In practice situations though, the clips are filled up to 95 rounds in order to
reduce the autoloaders tendency to jam up. 

The rifle also uses an electronic pulse action to fire, controlled from the trigger. The weapon can
be set to selective, burst, or full automatic depending on the select switch. Which allows the option
of a higher rate of fire up to the weapon's full cyclic rate of fire of 1000rpm. A LED display is
situated just below the receiver to indicate how much
ammunition is left in the clip. 

The underslung 30mm grenade launcher uses a pump action
to load the breech from the five round capacity to help the
internal feed. Once the launcher has been loaded, it can fire
the grenades using the trigger. This means that the weapon's
regular fire facility is immobilized while the launcher is
primed, although it's operator can override this option by
pressing the select switch fully down. The launcher sometimes employs the M40 figmentation
round as standard, but HEAP (High Explosive Armor Piercing). Other ammunition is also
available, such as White Phosphorus Incendiary and Hexachlorine Smoke ammunition is used
sometimes. 