At Friendly Fire, the name of the weapon is only visible on the first two levels of menus. In the Upgrades and Style menus the selected Costume and Skin are shown, but not the name of the weapon itself.
In the Upgrades menu, the description shown is that the default skin of the selected costume, rather than either the main description of the weapon, or the description of the skin.
Early leaked achievements for Saints Row IV named several weapons which did not appear in the final game, including "Glitch Gun" and "Micronizer", these weapons became the Bounce Rifle and Inflato-Ray, with their effects being changed into Super Power Elements.
In addition to the special "Spec Ops SMG" used in Zero Saints Thirty, there are disabled definitions and unlockables in the game data files for 3 additional weapons from that mission: Full Choke Silenced, Guardsman AR, Shokolov AR.