Armourer Historically , an armourer is a person who makes personal armour , especially plate armour . In modern terms , an armourer is a member of a military or police force who works in an armoury and maintains and repairs small arms and weapons systems , with some duties resembling those of a civilian gunsmith . With the renewed interest in traditional armour and weaponry , the occupation also involves working with film , stage , and historical and reenactment societies . Period costumes may require reproduction armour , swords , and related equipment . Great Britain . Armourers are the youngest trade in the British Army and trace their heritage back several centuries . Today they form a core role within the Corps of Royal Electrical and Mechanical Engineers ( REME ) and work on an extremely wide variety of weapon systems . Typically Armourers are attached to Infantry Battalions , where the Staff Sergeant Armourer also commands the REME Detachment of other tradesman ( including vehicle mechanics and electricians ) . Within the British Army , Armourers serve with a diverse range of units including : Infantry , Cavalry , Tanks , Special Forces and also in larger REME units providing depth repair . Armourers have the rank of Craftsman upon starting their trade training , which is the equivalent of Private and they have similar ranks of the remainder of the Army thereafter . As they increase in rank they can follow one of two streams : Artisan or Artificer . As an Artificer they must complete a Selection course and then a 2 year engineering course , where they emerge as a Staff Sergeant ( SSGT ) and have the potential to reach Warrant Officer Class 1 or even gain a Commission . Artisan Armourers remain in their trade and can achieve Warrant Officer Class 2 ( WO2 ) as a ceiling . On a day to day basis Armourers maintain a wide variety of weapons and optical equipment , typically using hand tools . They formally inspect every weapon every six months and advise their end users on all matters of equipment care . Within an Infantry Battalion they are exposed to the maximum varieties of weapons and optical equipment , with only Special Forces possessing more . Within the British Royal Air Force ( RAF ) , armourers are considered the most specialized of any trade . After spending an initial phase of generic training at RAF Halton with the majority other non commissioned trainees they transfer to DCAE Cosford for their trade specific training . Once qualified they can find themselves employed on a wide variety of tasks , including non trade specific jobs such as the flight line servicing of aircraft . As well as prepping , maintaining and loading aircraft bombs , missiles and aircraft assisted escape systems , they are also responsible for the maintenance of explosive release systems and small arms within station armouries like the L85A2 ( SA80 ) , 9mm Browning pistol and the GPMG ( General Purpose Machine Gun ) . Armourers can also volunteer to specialize in Explosive Ordnance Disposal and are often employed on the front line of conflicts clearing airfields from any unexploded ordnance ( UXO ) . They can also work alongside their army equivalents , the Ammunition Technician or ATO , helping to deal with improvised explosive devices . The founder of the RAF , Lord Trenchard , held armourers in high esteem , saying " without armament , there is no Air Force . " Ireland . Irish Army armourers are the technicians who are responsible for the inspection , maintenance and repair of all service weapons . These include rifles , light machine guns , pistols , recoilless weapons , heavy machine guns , mortars and associated equipment , including APC turrets , field kitchens . Personal battle equipment such as helmet , webbing and respirator also fall within their responsibilities . Their training takes a minimum of four years , where for the first three years they serve an apprenticeship to qualify as a fitter / turner and their final year is training within the ordnance school to become armourers . Following a minimum of 5 years mechanical work experience within an ordnance unit and reaching NCO rank they can be selected then go onto further training to become what is known as an Armament Artificer or AA , this training takes a minimum of 5 months . An Artificer is responsible for advanced maintenance and service inspection of heavy calibre weapons ( Artillery , Anti - aircraft , Cavalry main armament , shipborne weapons ) . They are part of the Ordnance Corps , which is the only corps of the Irish Army which due to the technical expertise and training required of its members , does not have an Irish reserve force subsidiarity . Individual line soldiers within an army infantry battalion are responsible for daily cleaning of their individual weapons , both the armourers and artificers ( also known by their unofficial title of " tiffies " ) maintain both internal and external components and structural integrity of all components of the weapon system by periodical inspection and gauging . Sighting , missile and robotic systems are maintained by technicians known as armament artificers instrument or AAI . These technicians also serve a four - year apprenticeship and qualify as electrical science engineers . Weapons which do not pass the armourers ' or artificers ' inspection are withdrawn from service to be repaired or destroyed . Ordnance personnel are expected to be proficient soldiers and will receive the same amount of training as line soldiers . They are on occasion expected to participate fully in ceremonial and operational duties and their rank structure is determined by the branch of the military they serve in for example Army - Private , Corporal , and so on . Australia . In a response to the disastrous unloading of the " Idomeneus " ship in January 1943 — where a wharf labourer died and many other were badly gassed by mustard gas leaking from a drum — the Royal Australian Air Force created a specialist unit , the Chemical Warfare Armourers . Their role was to handle , maintain and move upwards of 1 , 000 , 000 chemical weapons imported into Australia to counter a possible Japanese threat . United States . The title " armorer " was formerly part of several Military Occupational Specialty ( MOS ) designations across the services . Even where the title has disappeared , those with duties similar to those of earlier armourers are often referred to as such . At present the U . S . Army does not have a Military Occupational Specialty of " armorer " . At the unit level , an armourer duty position exists and is filled by soldiers holding the Unit Supply Specialist ( 92Y ) MOS ; these soldiers will have received some basic armourer training as part of their MOS training , and will often attend further armourer training when assigned to that duty position . Many of the traditional functions of an armourer are performed by a separate MOS , Small Arms Repairer ( MOS 91F , formerly 45B ) , which performs higher levels of ordnance maintenance and repair .