Rubber duck (military)
Encyclopedia
In the United States military, a rubber duck or "rubber ducky" refers to a fake training weapon, usually an M16 rifle
M16 rifle
The M16 is the United States military designation for the AR-15 rifle adapted for both semi-automatic and full-automatic fire. Colt purchased the rights to the AR-15 from ArmaLite, and currently uses that designation only for semi-automatic versions of the rifle. The M16 fires the 5.56×45mm NATO...

, used in basic training. Trainees are issued rubber ducks before they have been properly trained to use actual rifles, in order to become familiar with the care, responsible handling, and added weight of an M-16 during various activities, such as bayonet drills, water survival and marches. They are also used to train soldiers in various ceremonial practices that differ when soldiers are armed. For example, standing at attention
At attention
The position of At attention, or Standing at attention is a military posture which involves the following general postures:* Standing upright with an assertive and correct posture: famously "chin up, chest out, shoulders back, stomach in"....

 requires a different stance and set of movements when the soldier has a rifle in-hand.

Some rubber ducks are made by filling and coating an actual decommissioned M-16 rifle with rubber
Rubber
Natural rubber, also called India rubber or caoutchouc, is an elastomer that was originally derived from latex, a milky colloid produced by some plants. The plants would be ‘tapped’, that is, an incision made into the bark of the tree and the sticky, milk colored latex sap collected and refined...

 or plastic
Plastic
A plastic material is any of a wide range of synthetic or semi-synthetic organic solids used in the manufacture of industrial products. Plastics are typically polymers of high molecular mass, and may contain other substances to improve performance and/or reduce production costs...

. Some are also made using decommissioned rifle parts, with rubber or plastic used for the other parts. Still others are made entirely of rubber or plastic that has been molded to resemble both the exact shape and weight of a rifle.

Rubber duck use is being phased out in some areas of the Armed Forces, namely in Air Force Basic Training. They were replaced with M-16 replicas: metal models that resemble M-16 rifles, including most internal parts, but that lack the ability to fire. The replicas allow soldiers to learn disassembly and reassembly of their rifles much earlier in their training.
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