[ aw-toh-loh-der ]
/ ˈɔ toʊˌloʊ dər /
a firearm with an automatic loading mechanism.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for autoloader
They had two rifles, one an autoloader, and they had in all likelihood three negatron pistols.The Keeper|Henry Beam Piper