The rules that use the vocabulary item "gun" are:

<specific_platoon_type-creatable-sing>

57mm anti air machine gun

<i_f_v-sing>

37mm anti air machine gun

<specific_squad_type-not_creatable-sing>

m240g machine gun

machine gun

<breach_type>

gun

<specific_squad_type-creatable-sing>

m240g machine gun

machine gun

<specific_section_type-not_creatable-sing>

37mm anti air machine gun

commando machine gun

opfor commando machine gun

swa commando machine gun

<specific_team_type-sing>

37mm anti air machine gun

57mm anti air machine gun

heavy machine gun

m240g machine gun

machine gun

<specific_section_type-creatable-sing>

37mm anti air machine gun

commando machine gun

opfor commando machine gun

swa commando machine gun

<specific_team_type-creatable-sing>

37mm anti air machine gun

57mm anti air machine gun

heavy machine gun

m240g machine gun

machine gun

<i_f_v>

37mm anti air machine gun

<specific_team_type-not_creatable-sing>

37mm anti air machine gun

57mm anti air machine gun

heavy machine gun

m240g machine gun

machine gun

<base_of_fire_nom>

machine gun base of fire

<specific_squad_type-sing>

m240g machine gun

machine gun

<specific_section_type-sing>

37mm anti air machine gun

commando machine gun

opfor commando machine gun

swa commando machine gun

<specific_platoon_type-not_creatable-sing>

57mm anti air machine gun

<specific_platoon_type-sing>

57mm anti air machine gun