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|name= Canon de 138 mm Modèle 1927 |image=[[File:138 mm gun model 1ret.jpg|300px|]]

| part_length = 1300 mm <!-- Artillery specifications -->

|length= {{convert|1030|mm|ftin|abbr=on}} |part_length= {{convert|875|mm|ftin|0|abbr=on}} without gas generator

|image= [[Image:120 mm M1 gun 1.jpg|300px]] |caption= A 120 mm M1 anti-aircraft gun at [[United States Army Ordnance Museum|US Army Ordnan

|caliber={{convert|149.1|mm|in}} <!-- Artillery specifications -->

|caliber=8inch&nbsp;mm <!-- Artillery specifications -->

The '''20 mm [[Stahlwerke Becker|Becker]]''' was a German automatic cannon developed for ...elp develop and fine-tune the design, leading to a production contract for 120 Becker Type M2 guns in June 1916. In addition to the orders for aircraft gu

|cartridge=[[20 x 138B cartridge|20 × 138 mm. B]] |caliber=20 mm (.79 in)

The '''Shipunov 2A42''' is a [[Soviet Union|Soviet]]/[[Russia]]n 30&nbsp;mm [[automatic cannon]]. It is built by the Tulamashzavod Joint Stock Company. ...ent projects from various manufacturers. The design bureau for the 30&nbsp;mm 2A42 cannon is the KBP Instrument Design Bureau.

|caliber=37 mm (1.45 in) |rate=120 rounds per minute

|caption=381 mm/50 [[Caliber#Caliber as measurement of length|caliber]] guns firing during |caliber={{convert|381|mm|in|sing=on|sigfig=2}}<ref name="Campbell"/>

| armour=6–13 mm on the hull, 28 mm on the turret | primary_armament=40&nbsp;mm Bofors/60 AA-gun

...[United States Navy]] and [[United States Coast Guard]] as the [[Mk 110 57 mm gun]]. * 120 rounds ready to fire with immediate shift between two types of ammunition.

|caliber={{convert|200|mm|in|sigfig=1|sp=us}} <!-- Artillery specifications -->

|caption= 90 mm M1 at [[CFB Borden]] |name= 90 mm M1A1

| rate = 120 rds/min <!-- Artillery specifications -->

[[Image:M2Bradley-M242.jpg|thumb|[[M242]] 25&nbsp;mm Bushmaster autocannon on an [[M2 Bradley]]]] [[Image:XM307-01.jpg|thumb|[[XM307]] 25&nbsp;mm caliber 2-man portable autocannon]]

|name= BL 4.7 inch (120 mm) 45 calibre naval gun |caliber={{convert|120|mm|in|sigfig=4}}

...: {{convert|108|in|m|sigfig=4}} bore (27 calibres)<ref name=Gunnery1902/> 120 inches total<ref name="DiGiulian"/> |caliber={{convert|4|in|mm|sing=on|sigfig=4}}

...40 mm grenade]]s in both the low velocity 40x46 mm and high velocity 40x53 mm calibers which uses what it calls [[High-Low System|High-Low Propulsion Sys HE grenades may well be the standard for both types of 40 mm grenades, but over the years the functions of the weapons using these grena

|used_by=[[Royal Garrison Artillery, Royal Artillery from 1922]] ...length=Mk IX : {{convert|430|in|mm|sigfig=5}}<br>Mk X : {{convert|429.3|in|mm|sigfig=5}} bore (46.7 [[Caliber#Caliber_as_measurement_of_length|cal]])<ref

|caliber={{convert|120|mm|in}} <!-- Artillery specifications -->

|name= Bofors 40 mm gun |caption= '''Bofors 40 mm/L60'''. This example includes the British-designed ''Stiffkey Sight'', bein

|name=Bofors 57 mm |caption=Bofors 57 mm Mk 1, as mounted on the Swedish Spica-II Class FAC.

|name= Canon de 138 mm Modèle 1929 |caliber={{convert|138.6|mm|in}}

|weight=120 kg <!-- Artillery specifications -->

...oped in the interwar period by [[Stewart Blacker|Lt-Col Blacker]], [[Royal Artillery|RA]]. The spigot mortar was based on early [[infantry]] trench mortars. By *'''Calibre''': 7 in (178 mm)

The '''[[Hispano-Suiza]] HS.820''' was a 20 mm [[autocannon]] developed primarily for aircraft use, but more widely used i ....uk/an_introduction_to_collecting_20.htm "An introduction to collecting 20 mm cannon cartridges"], Anthony Williams</ref> The HS.820's high 1100 m/s [[mu

*'''Caliber:''' 37&nbsp;mm (1.45&nbsp;in) *'''Rate of fire:''' 120 rounds/min

! width=12% | [[Caliber]] (mm) | 20 mm || [[Oerlikon 20 mm cannon]] || {{CHE}} || World War II

|length= {{mm to in|1650|abbr=on|precision=1|wiki=yes}} |part_length= {{convert|1143|mm|abbr=on|1}}

...pon system|CIWS]], using twelve [[Oerlikon Contraves|Oerlikon]] 20&nbsp;mm/120 guns mounted in 2 rows of 6 guns each. The system's primary purpose is defe * '''Gun''': 12 × Oerlikon 20&nbsp;mm/120.

|caliber= 30 mm (1.18 in) ...s quite powerful, but with a relatively low initial velocity, while the 37 mm was lacking in rate of fire and ammunition reserve.

|name= 35 mm Oerlikon GDF-003 |image= [[File:35 mm Oerlikon.jpg|300px]]

|cartridge= 35 x 228 mm |caliber=35 mm

|name=Otobreda 76 mm |part_length=62 caliber: {{convert|4724.4|mm|in|abbr=on|lk=on}}

|part_length={{convert|120|in|m|3|adj=on}} <!-- Artillery specifications -->

...[Caliber#Caliber_as_measurement_of_length|cal]])<br>Total {{convert|140|in|mm|sing=on}}<ref name=Hogg&Thurston1972page79/> |caliber=3 inch (76 mm)

The '''QF 4.5&nbsp;inch (113&nbsp;mm) gun''' has been the standard medium-calibre gun used by the [[Royal Navy]] ...aval guns, the QF Mk I has an actual calibre of 4.45&nbsp;inches (113&nbsp;mm)<ref>Jane's Ammunition Handbook, 1999-2000 Edition. http://www.janes.com</r

|type=[[Naval gun]]<br>[[Field gun|Medium field gun]]<br>[[Coastal artillery|Coastal defence gun]] |caliber={{convert|120|mm|sigfig=3}}

|caliber={{convert|120|mm|in|sigfig=3|sing=on}} <!-- Artillery specifications -->

|caption=Launceston Volunteer Artillery, Tasmania, 1902 |caliber={{convert|4.75|in|mm|sing=on|sigfig=4}}<ref name=Gunnery1887/>

...e Industries]] (UDI) purchased Bofors Weapon Systems from Saab (the tube [[artillery]] interests), while Saab retained the [[missile]] interests. *[[M3 MAAWS|Carl-Gustaf M3 (M3 MAAWS)]] 84 mm anti-tank weapon system

|variants= 35x228 mm |rate= 3,000 rpm (anti-aircraft), 120 rpm (ground targets)

|number= 120 |caliber=120 mm

<!-- Artillery specifications --> The Type 91 [[torpedo]] had 450&nbsp;mm (17-3/4 in) diameter. There were five models of body design and five models

|name=Type 96 25 mm dual purpose gun |cartridge=25×163 mm.

|name=Type 98 20 mm anti-aircraft machine cannon |image=[[Image:Type 98 Japanese 20 mm anti-aircraft gun - Beijing Museum.jpg|300px]]

[[File:Typhoon25mm001.jpg|thumb|Typhoon armed with 25 mm gun on [[Shaldag class fast patrol boat]] of the [[Israeli Navy]].]] ...5 [[Radian|mrad]], allowing it to keep the weapon aimed to within 250&nbsp;mm / 9&nbsp;inches on a target 1000 m / 1000 yards away.

...ance for the Restoration of Peace and Counter-Terrorism|ARPCT]]:'''<br/>~1,120 killed <br/> '''Philippine military:''' <br/> 445+ killed, 1 POW<br/> '''Ot ...l|HNLMS ''Van Amstel'']] (F 831); and [[Durand De la Penne class destroyer|MM ''Durand de la Penne'']] (D 560).]]