Sub-caliber training is used to save wear and expense when training with a larger gun by use of smaller weapons (sometimes, but not always, with very similar ballistic characteristics). The smaller weapons could be inserted into the larger weapon's barrel, externally attached to the barrel or mounted above the weapon. Examples include 2.25-Inch Sub-Caliber Aircraft Rocket to train aircraft pilots to shoot aerial rockets that emerged during WWII, or the M303 Sub-Caliber insert for the

M120 mortar The Soltam K6 is a 120 mm (4.75 inch) mortar that was developed by Soltam Systems of Israel. It is the long-range version of the Soltam K5 and has replaced older systems, such as the M30, in several armies including the United States Army. ...

that allows the mortar to use ammunitionMORTARS - DEPARTMENTS OF THE ARMY TECHNICAL ORDER 11W2-5-13-21
/ref> or the M49A1 sub-caliber device, which used 7.62×51mm NATO rifle rounds in the

M67 recoilless rifle The M67 recoilless rifle is a 90 mm (3.55 inch) anti-tank recoilless rifle made in the United States and later in South Korea. It could also be employed in an anti-personnel role with the use of the M590 antipersonnel round. It was designed ...

. These devices/weapons have been used for guns as large as the main guns of

battleship A battleship is a large armored warship with a main battery consisting of large caliber guns. It dominated naval warfare in the late 19th and early 20th centuries. The term ''battleship'' came into use in the late 1880s to describe a type of ...

References

Military education and training {{Weapon-stub

See also

References