Gun-type weapon - definition of gun-type weapon by The Free Dictionary
A device in which two or more pieces of fissionable material, each less than a critical mass, are brought together very rapidly so as to form a supercritical mass that can explode as the result of a rapidly expanding fission chain.
References in periodicals archive
She looked outside and saw Andrew Stephenson, 23, hurrying from the house carrying a long gun-type weapon
We know that it takes about 50 kilograms (110 pounds) of 90 percent enriched uranium to build a gun-type weapon
equivalent to the Hiroshima bomb.
He turned to get away "and all of a sudden another gunman appeared in front of us, carrying machine gun-type weapons