SAPI

Military abbreviation · Weapon and Military Equipment

SAPI
Stands forSmall Arms Protective Insert
CategoriesMilitary

SAPI stands for Small Arms Protective Insert, a weapon and military equipment abbreviation.

Ceramic armor plate inserted into the front and back of US body armor vests to stop rifle bullets. Improved versions are called Enhanced SAPI (ESAPI), with side plates protecting the torso's flanks.

Example: Make sure both SAPI plates are in your vest before we roll out.

Usage notes

SAPI plates were introduced with the Interceptor body armor around 1999. Cracked plates must be replaced, so they are inspected with X-rays. Plate weight is a constant complaint, prompting lighter designs.

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