a rectangular cartridge holder in a submachine or light machine gun.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for box magazine
Historical Examples of box magazine
They were modern weapons,--the new high power 30-40 box-magazine rifle, shooting government ammunition,--and had been used.The Mystery
Stewart Edward White and Samuel Hopkins Adams