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

|caption=Aft 283 mm dual turret on [[Coastal defence ship]] Gustav V |length=cal 45

|name=15 cm SK L/45 |caliber={{convert|149.1|mm|in}}

|name=Vickers 10 inch /45 naval gun<br> Type 41 10-inch (254 mm) /45-caliber naval gun<br>BL 10 inch Mk VII |part_length={{convert|450|in|m|3|adj=on}} bore (45 calibres)

|name= 12"/45 caliber Mark 5 Naval Gun |image=[[File:12-45 mk5 Connecticut gun pic.jpg|300px]]

|caliber= {{convert|12|in|mm|sigfig=4}}<ref name=navweaps/> The ships in the class had twelve 305 mm guns each, mounted in six twin (2-gun) turrets, with two turrets forward, t

|caliber= {{convert|14|in|mm|sing=on}} <!-- Artillery specifications -->

|name= 16"/45 caliber gun |caption= Battleship armament: 16"/45 caliber guns aboard the battleship [[USS South Dakota (BB-57)]].

|type=Naval Artillery |caliber= {{convert|16|in|mm|sing=on}}

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

|image=[[Image:USS Guam (CB-2) firing main battery, 1944-45.jpg|300px]] |caliber= {{convert|12|in|mm|sigfig=4}}<ref name=navweaps/>

|name= 14"/45 caliber gun ...|BB-35|6}} pause to have their picture taken on top of one of the dual 14"/45 [[caliber#Caliber as measurement of length|caliber]] gun turrets, 1918.

|caliber=16 in (406 mm) ...e to its power it is regarded by many as one of the most effective [[naval artillery|battleship gun]]s ever designed.<ref>{{cite web

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

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

|name= 305mm/45 Modèle 1906 gun |caliber=305&nbsp;mm

|caliber={{convert|330|mm|in|sing=on}} <!-- Artillery specifications -->

|name= 340mm/45 Modèle 1912 gun |caliber=340&nbsp;mm

|name=37 mm automatic air defense gun M1939 (61-K) |caption=61-K in Saint Petersburg Artillery Museum.

|name= 380mm/45 Modèle 1935 |image=[[File:Canon - 380 mm - 2views .jpg|300px|]]

|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"/>

|part_length={{convert|244.75|in|m|sigfig=4}} bore (55 [[Caliber (artillery)|calibres]]) |caliber=4.45-inch (113 mm)<ref name=Janes1999/><!-- Many sources quote 114mm as the calibre but it is

|name=40 cm/45 Type 94 |caliber=460&nbsp;mm

|name=45&nbsp;mm anti-aircraft gun (21-K) |caliber={{convert|45|cm|in}}

...5&nbsp;inches (127&nbsp;mm) in diameter, and the barrel was 25 [[Caliber (artillery)|caliber]]s long (that is, for a 5" bore and a barrel length of 25 calibers *{{USS|Colorado|BB-45}}<ref name=B230>Breyer 1973 p.230</ref>

|cartridge= 5 inch (127 mm) <!-- Artillery specifications -->

|cartridge= 5 inch (127 mm) <!-- Artillery specifications -->

|cartridge= 5" (127 mm) <!-- Artillery specifications -->

|cartridge= 5" (127 mm) <!-- Artillery specifications -->

{{redirect|Mark 45|the torpedo|Mark 45 torpedo}} |name= Mark 45 5-inch/54-caliber lightweight gun

|image= [[Image:75 mm L45 M16.png|250px]] |caption= The [[patent drawing]] of the 7.5 cm L/45 M/16 anti aircraft gun

|name= 7.5 cm L/45 M/32 |caliber= 75 mm

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

<!-- Artillery specifications --> Originally designed for mounting as a vertical gun, this 155&nbsp;mm (6.1") caliber gun has since been slated for mounting within a more convent

|part_length={{convert|4.05|m|ft}} L/45 |caliber={{convert|90|mm|in}}

[[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]]

|caliber= {{convert|12|in|mm|sigfig=4}} ...ch Guns and Above April, 1918] 2825 ft/second using 307 lb cordite MD size 45 propellant : [[Treatise on Ammunition]], 1915</ref>

|caliber= {{convert|12|in|mm|sigfig=4}} |part_length={{convert|540|in|m|sigfig=4}} bore (45 [[Caliber#Caliber_as_measurement_of_length|cal]])

|weight=Mk I : 47 tons barrel & breech<br> Mk II - V 45 tons<ref name=Gunnery1887TableXVI>Text Book of Gunnery, 1887. Table XVI, Pa |caliber={{convert|12|in|mm|sing=on|sigfig=4}}

|part_length=Bore {{convert|607.5|in|m|sigfig=5}} (45 cal) |caliber={{convert|13.5|in|mm|sigfig=4|sing=on}}

[[Image:British 14in Naval Gun 1930s Model.png|400px|thumb|right|A BL 14in/45]] ...mbination of high velocity but relatively light shell in the [[BL 16 inch /45 naval gun]] of the [[Nelson class battleship|''Nelson'' class battleships]]

|caliber=16&nbsp;inch (406&nbsp;mm) <!-- Artillery specifications -->

| caliber = {{convert|18|in|mm}} <!-- Artillery specifications -->

|name= BL 4.7 inch (120 mm) 45 calibre naval gun |part_length={{convert|5.4|m|in|sigfig=3}} bore (45 [[Caliber#Caliber_as_measurement_of_length|calibres]])

|part_length={{convert|180|in|m|sigfig=4}} bore (45 [[Caliber#Caliber_as_measurement_of_length|calibres]]) |caliber={{convert|4|in|mm|sigfig=4}}

|type=[[Naval gun]]<br>[[Coastal artillery|Coastal defence gun]]<br>[[Field gun|Heavy field gun]] |caliber= {{convert|6|in|mm|sigfig=4}}

|caliber= {{convert|6|in|mm|sigfig=4}} |part_length={{convert|270|in|m|sigfig=4}} bore (45 [[Caliber#Caliber_as_measurement_of_length|cal]])<ref>Handbook, 1917, Page

|caliber= {{convert|6|in|mm|sigfig=4}} ...[Caliber#Caliber_as_measurement_of_length|calibres]] high-velocity [[naval artillery|naval gun]] which was mounted as primary armament on [[cruiser]]s and secon

|part_length={{convert|337.5|in|mm|sigfig=4}} bore (45 [[Caliber#Caliber_as_measurement_of_length|calibres]]) |caliber={{convert|7.5|in|mm|sing=on|sigfig=4}}

|type= [[Naval gun]]<br>[[Coastal artillery|Coast defence gun]] |part_length={{convert|337.5|in|m|sigfig=2}}; (45 [[Caliber#Caliber_as_measurement_of_length|calibres]])<ref name="Campbell"/

...r>Mk VII : {{convert|204|in|mm|sigfig=4}}<br>Mk IV & VI : {{convert|237|in|mm|sigfig=4}} bore<ref name=Gunnery1902/> |caliber={{convert|8|in|mm|sing=on|sigfig=4}}

|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

|cartridge=45 kg |caliber={{convert|152|mm|in}}

|name=Bofors 37 mm anti-tank gun |part_length=45 calibers

|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}}

|name=EOC 10 inch 45-calibre naval gun |part_length=Bore {{convert|450|in|m|sigfig=5}} (45 cal)

|name=EOC 12 inch 45-calibre naval gun<br>12"/45 41st Year Type |part_length=Bore {{convert|540|in|m|sigfig=5}} (45 [[Caliber#Caliber as measurement of length|cal]])

|name=Elswick 14 inch 45-calibre naval gun |part_length=Bore {{convert|630|in|m|sigfig=5}} (45 cal)

|cartridge= 30 × 173 mm |caliber= [[30 mm caliber]]

...ghting troops of industrialized nations, Gatling guns could be targeted by artillery they could not reach and their crews could be targeted by [[sniper]]s they ...1865.jpg|thumb|right|A British 1865 Gatling gun at [[Firepower - The Royal Artillery Museum]]]]

...et aircraft speed and direction.<ref>Weapon Control in the Royal Navy 1935-45, Pout </ref> ...chymetric]] fire control system.<ref>Weapon Control in the Royal Navy 1935-45, Pout </ref> The GRU and the GRUB began to appear on RN ships in 1940.<ref>

...closed-loop ammunition belt. It was used only as the nose gun of the [[Ki-45]] KAI heavy fighter, the anti-bomber workhorse of the Imperial Japanese Arm *'''Caliber:''' 37&nbsp;mm (1.45&nbsp;in)

|name=Ho-301 40 mm cannon |image=[[Image:Ho-301 40 mm projectile.jpg|300px]]

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

|primary_armament=[[Bofors 40 mm gun|M2A1 40 mm]] twin anti-aircraft gun |secondary_armament=1 x [[Browning Model 1919 machine gun|M1919A4 7.62 mm machine gun]]

|name= 37 mm Automatic Gun, M4 |caliber=37 mm (1.46 in)

|cartridge= 20 x 80 mm |caliber= 20 mm

|name=Nudelman-Suranov NS-45 |image=[[File:Ns-45-gor1p149-prev.jpg|300px]]

|name=Oerlikon 20 mm cannon |caliber=20 mm

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

...471 The Pom-Pom Director, Mark IV in ''The Gunnery Pocket Book'', B.R. 224/45, 1945] placed online courtesy of Historic Naval Ships Association ...of the Pom-Pom Director, Mark IV in ''The Gunnery Pocket Book'', B.R. 224/45, 1945] placed online courtesy of Historic Naval Ships Association

|part_length={{convert|135|in|m|sigfig=4}}bore (45 [[Caliber#Caliber_as_measurement_of_length|calibres]])<ref>[http://www.gwpd |caliber={{convert|3|in|mm|sigfig=3|sing=on}}

|caliber= 40 mm (1.575 in) <!-- 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)

...]] and shore bombardment targets since 1938. This article covers the early 45-[[Caliber#Caliber as measurement of length|calibre]] family of guns up to t ...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]] ...urston 1972, Page 242; ''Treatise on Ammunition'' 10th Edition 1915, pages 45, 165, 170, 188, 217.</ref>

|part_length={{convert|212.6|in|m}} (45 [[Caliber#Caliber as measurement of length|cal]])<ref Name=Hogg&Thurston197 ...ridge=[[British ordnance terms#Separate QF|Separate loading QF]] {{convert|45|lb|kg|sigfig=4}} [[British ordnance terms#Common Pointed|Common Pointed]],

|type= [[Naval gun]]<br>Heavy [[anti-aircraft gun]]<br>[[Coastal artillery|Coastal defence gun]] |part_length=Bore {{convert|180|in|m|sigfig=2}} (45 [[Caliber#Caliber_as_measurement_of_length|cal]]) Total {{convert|187.8|in|

...eb|url=http://www.navweaps.com/Weapons/WNBR_4-45_mk16.htm|title=British 4"/45 (10.2 cm) QF HA Marks XVI, XVII, XVIII and XXI |publisher=NavWeaps|accessda |part_length={{convert|180|in|mm|sigfig=4}} (45 cal))

| caliber = {{convert|5.25|in|mm|sing=on}} | range = {{convert|23400|yd|m}} at 45 degrees with HE shell

|caliber={{convert|9|in|mm|sing=on|sigfig=4}} <!-- Artillery specifications -->

...ry armament, by the end of the war, with RPC first appearing on Vickers 40 mm (Pom Pom) 4 and 8 barrel mounts in late 1941.</ref> .... [[Sailor]]s would stand around a box 62 inches long, 38 inches wide, and 45 inches high. Even though built with extensive use of an aluminum alloy fram

|caliber=100 mm <!-- Artillery specifications -->

|diameter=45 cm (17-3/4 in) <!-- Artillery specifications -->

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

...(arms)|advanced primer ignition blowback]] mechanism pioneered by the [[20 mm Becker|Becker]] cannon, but fired different ammunition: 20x72RB, 20x100RB a ...igō Kizyū, Kanji: 九九式二号機銃) The Japanese Navy classified 20-mm weapons as machine guns rather than cannon.<ref name="Mikesh"/> These weapo