Click here for Wookieepedia's article on the Canon version of this subject.  This article covers the Legends version of this subject. 

OnALegendsArticleGoToCanon

A proton warhead was a model of explosive warhead. Miniature proton warheads were installed in Arakyd Industries' 3t3 missile, and were powerful enough to destroy a combat airspeeder, and inflict significant damage on starfighters and All Terrain Armored Transports with a precise enough shot.[1]

Sources

Notes and references