User blog comment:Sentry 616/Weapon Gushing/@comment-35455126-20190808031411/@comment-27144409-20190809143714

Ah, the incendiary 4 barrel. Fun fact, they tested the HEAT rounds of the same caliber used by the M72 in a FLASH prottype, and while they worked, the production models were never documented to be used with them, since they never mass-produced 4 round clips for the HEAT rounds, only the incendiary ones.