USN Naval Gun Designation List

[Tzoli]

This is my most complete list of the United States Navy's Gun which were used or tested in service or just designed and proposed:

Naval Gun Marks:
20"/45 No mark given - 1917 Test gun might be Mark A, the production gun might be Mark 1

18"/47 Mark A - 1941
18"/48 Mark 1 - 1917

18"/30 Bethlehem - 1912 export gun no other designation I know of

16"/45 Mark 8 - 1940 - Re-bored/re-furbished Chromium plated Mark 1
16"/50 Mark 7 - 1939
16"/45 Mark 6 - 1936
16"/45 Mark 5 - 1935 - Re-bored/re-furbished Mark 1
16"/56 Mark 4 - 1922 - 18"/48 Re-bored test gun
16"/55 Mark A - 1920 - Long calibre test gun
16"/50 Mark 3 - 1918
16"/50 Mark 2 - 1916
16"/45 Mark 1 - 1913

14"/45 Mark 12 - 1938 - Chromium plated Mark 5
14"/50 Mark B - 1937 - Test gun for North Carolina
14"/50 Mark 11 - 1935 - Chromium plated Mark 7
14"/45 Mark 10 - 1932 - Re-bored/re-furbished Mark 5
14"/45 Mark 9 - 1930 - Re-bored/re-furbished Mark 3
14"/45 Mark 8 - 1928 - Re-bored/re-furbished Mark 1
14"/50 Mark 7 - 1930 - Re-bored/re-furbished Mark 4
14"/50 Mark 6 - 1918
14"/45 Mark 5 - 1916
14"/50 Mark 4 - 1916
14"/45 Mark 3 - 1910
14"/45 Mark 2 - 1909
14"/45 Mark 1 - 1908
14"/45 Bethlehem - 1914 export gun no other designation I know of
14"/45 Bethlehem - 1909 export gun no other designation I know of
14"/45 Bethlehem - 1909 export gun no other designation I know of

13"/35 Mark 2 - 1896
13"/35 Mark 1 - 1894

12"/70 No mark given Proposed gun for the LRGS Program (Long Range Gun System) might be Mark 9 - 1969
12"/50 Mark 8 - 1939
12"/50 Mark 7 - 1910
12"/45 Mark 6 - 1906
12"/45 Mark 5 - 1903
12"/40 Mark 4 - 1900
12"/40 Mark 3 - 1899
12"/35 Mark 2 - 1893
12"/35 Mark 1 - 1889
12"/50 Bethlehem - 1910 export gun no other designation I know of
12"/45 Bethlehem - 1910 export gun no other designation I know of

10"/40 Mark 3 - 1905
10"/35 Mark 2 - 1887
10"/31 Mark 1 - 1885
10"/50 Bethlehem - 1910 export gun no other designation I know of
10"/45 Bethlehem - 1910 export gun no other designation I know of

9,2"/50 Bethlehem - 1910 export gun no other designation I know of

9"/98 Mark 1 - 1919 Test gun, re-lined 14"/50 Mark 4

8"/60 No mark given Proposed gun for the Fire SupportShip program might be Mark 33 - 1985
8"/55 Mark 32 Production version of the Mark 28 - 1978
Unknown Mark 29-31 guns
8"/55 Mark 28 Test gun of the MCLWG program (Medium Calibre Light Weight Gun) - 1971
Unknown Mark 17-27 guns
8"/55 Mark 16 - 1943
8"/55 Mark 15 - 1942
8"/55 Mark 14 - 1938 Re-lined Chromium plated Mark 9
8"/55 Mark 13 - 1934 Re-lined partially Chromium plated Mark 9
8"/55 Mark 12 - 1933
8"/55 Mark 11 - 1928
8"/55 Mark 10 - 1925
8"/55 Mark 9 - 1922
8"/15 Mark 8 - 1915 British BL Mark VI
8"/23 Mark 7 - 1917 ASW Howitzer
8"/45 Mark 6 - 1900
8"/40 Mark 5 - 1894
8"/35 Mark 4 - 1890
8"/35 Mark 3 - 1889
8"/30 Mark 2 - 1887
8"/30 Mark 1 - 1886
8"/50 Bethlehem - 1910 export gun no other designation I know of
8"/45 Bethlehem - 1910 export gun no other designation I know of

7"/45 Mark 2 - 1901
7"/44 Mark 1 - 1900
7"/50 Bethlehem - 1901 export gun no other designation I know of
7"/45 Bethlehem - 1901 export gun no other designation I know of

6,9"/60 No mark given Proposed gun for the MCLWG program (Medium Calibre Light Weight Gun) might be Mark 1 - 1969

6,1"/62 Unknown Gun mark of the AGS (Advanced Gun System) - 1996

6"/47 Mark 18 - 1934
6"/47 Mark 17 - 1933
6"/47 DP Mark 16 - 1943
6"/47 Mark 16 - 1932
6"/52 Mark 15 - 1920
6"/53 Mark 14 - 1920
Unknown Mark 13 gun used as a Depth Charge projector probably 6"/5 or /10
6"/53 Mark 12 - 1916
6"/50 Mark 11 - 1902 Unknown British Vickers gun
6"/45 Mark 10 - 1902 Unknown British Vickers gun
6"/45 Mark 9 - 1905
6"/50 Mark 8 - 1903
6"/40 Mark 7 - 1901
6"/50 Mark 6 - 1899
6"/50 Mark 5 - 1898 British BL Mark IX and/or Mark X
6"/40 Mark 4 - 1895
6"/30 Mark 3 - 1890
6"/30 Mark 2 - 1885
6"/30 Mark 1 - 1883
6"/44 Bethlehem - 1914 export gun no other designation I know of
6"/50 Bethlehem - 1910 export gun no other designation I know of
6"/45 Bethlehem - 1910 export gun no other designation I know of

5,4"/48 Mark 1 - 1939 Prototype, Alternative to the 5"/54 Mark 16

5,3"/40 Mark 1 - 1931 Prototype, developed into the 5"/38 Mark 12

5"/62 Mark 36 - 1995
5"/84 No mark given Proposed gun for the Fire Support Ship program might be Mark 35 - 1985
Unknown Mark 22-35 guns
5"/54 Unknown Mark - 1968 Gun for the Mark 66 mounting probably designation Mark 21
5"/54 Unknown Mark - 1965 Gun for the Mark 65 mounting probably designation Mark 20
5"/54 Mark 19 - 1968
5"/70 Mark F - 1951 - Test Gun co-development with the British QF Mark N1
5"/54 Mark 18 - 1950
5"/25 Mark 17 - 1941
5"/54 Mark 16 - 1940
5"/51 Mark 15 - 1938
5"/51 Mark 14 - 1936
5"/25 Mark 13 - 1934
5"/38 Mark 12 - 1932
5"/40 Unknown Gun mark, developed into the 5"/38 Mark 12
5"/25 Mark 11 - 1922
5"/25 Mark 10 - 1921
5"/51 Mark 9 - 1911
5"/51 Mark 8 - 1911
5"/51 Mark 7 - 1907
5"/50 Mark 6 - 1905
5"/50 Mark 5 - 1900
5"/40 Mark 4 - 1898
5"/40 Mark 3 - 1896
5"/40 Mark 2 - 1889
5"/31 Mark 1 - 1888
5"/50 Bethlehem - 1905 export gun no other designation I know of
5"/45 Bethlehem - 1905 export gun no other designation I know of

4,7"/35 Mark 4 - 1898 Unknown British Armstrong gun
4,7"/50 Mark 3 - 1896 Unknown British Armstrong gun
4,7"/42 Mark 2 - 1889 Unknown British Vickers gun
4,7"/47 Mark 1 - 1888 Unknown British Vickers gun

4"/50 Mark 10 - 1914
4"/50 Mark 9 - 1911
4"/50 Mark 8 - 1905
4"/50 Mark 7 - 1898
4"/40 Mark 6 - 1898
4"/40 Mark 5 - 1895
4"/40 Mark 4 - 1892
4"/40 Mark 3 - 1890
4"/40 Mark 2 - 1889
4"/40 Mark 1 - 1889
4"/50 Bethlehem - 1911 export gun no other designation I know of
4"/50 Bethlehem - 1911 export gun no other designation I know of
4"/40 Bethlehem - 1910? export gun no other designation I know of

3"/62 Unknown Mark - 1970 Italian OTO-Malera Gun of the Mark 75 Mounting
3"/70 Mark 26 - 1956
3"/70 Mark 25 - 1952
3"/70 Mark 24 - 1948
3"/70 Mark 23 - 1945
3"/50 RF Mark 22 - 1945
3"/50 Mark 22 - 1944
3"/50 Mark 21 - 1940
3"/50 Mark 20 - 1935
3"/50 Mark 19 - 1930
3"/50 Mark 18 - 1925
3"/50 Mark 17 - 1920
3"/105 Mark 16 - 1919 Test gun, re-lined 7"/45 Mark 2
3"/24 Mark 15 - 1917 Davis recoiless gun
3"/24 Mark 14 - 1917
3"/23 Mark 13 - 1917
3"/15 Mark 12 - 1917 USMC Mountain gun
3"/23 Mark 11 - 1914
3"/50 Mark 10 - 1913
3"/23 Mark 9 - 1913
3"/50 Mark 8 - 1909
3"/23 Mark 7 - 1909
3"/50 Mark 6 - 1908
3"/50 Mark 5 - 1907
3"/24 Mark 4 - 1906
3"/50 Mark 3 - 1905
3"/50 Mark 2 - 1900
3"/21 Mark 1 - 1890
3"/50 Bethlehem - 1911 export gun no other designation I know of

57mm/70 Unknown Mark - 1995 Swedish Bofors Mark 3 Gun for the Mark 110 mounting
No design dates:
57mm/33 9pdr Mark 13
57mm/32 6pdr Mark 12
57mm/50 6pdr Mark 11 - French Gun
57mm/42 6pdr Mark 10 - British Gun
57mm/42 6pdr Mark 9 - British Gun
57mm/50 6pdr Mark 8 - French Gun
57mm/45 6pdr Mark 7 - French Gun
57mm/45 6pdr Mark 6 - French Gun
57mm/35 6pdr Mark 5
57mm/50 6pdr Mark 4 - French Gun
57mm/45 6pdr Mark 3 - French Gun
57mm/40 6pdr Mark 2 - French Gun
57mm/40 6pdr Mark 1 - French Gun
57mm/50 Bethlehem - 1910 export gun no other designation I know of

No design dates:
47mm/50 3pdr Mark 14
47mm/40 3pdr Mark 13
47mm/50 3pdr Mark 12
47mm/50 3pdr Mark 11
47mm/50 3pdr Mark 10
47mm/42 3pdr Mark 9
47mm/40 3pdr Mark 8
47mm/45 3pdr Mark 7
47mm/50 3pdr Mark 6
47mm/50 3pdr Mark 5
47mm/45 3pdr Mark 4
47mm/45 3pdr Mark 3
47mm/45 3pdr Mark 2
47mm/40 3pdr Mark 1 - 1885
47mm/50 Bethlehem - 1910 export gun no other designation I know of

40mm/16 Mark 19 - 1976 Grenade MG, not sure if mounting or gun designation Mark
40mm/56 Mark 2 - 1941 Swedish Bofors Gun
40mm/56 Mark 1 - 1941 Swedish Bofors Gun

37mm/56 M4 Browning MG - 1937
37mm/56 M1 Browning MG - 1927
No design dates:
37mm/56 1pdr Mark 16
37mm/20 1pdr Mark 15
37mm/40 1pdr Mark 14
37mm/40 1pdr Mark 13
37mm/40 1pdr Mark 12
37mm/20 1pdr Mark 11
37mm/40 1pdr Mark 10
37mm 1pdr Mark 9 - British Gun
37mm/40 1pdr Mark 8 - French Gun
37mm/30 1pdr Mark 7 - British Gun
37mm/43 1pdr Mark 6 - British Gun
37mm/40 1pdr Mark 5 - French Gun
37mm/50 1pdr Mark 4
37mm/40 1pdr Mark 3 - French Gun
37mm/40 1pdr Mark 2
37mm/20 1pdr Mark 1 - 1885 French Gun
37mm/70 Unknown gun designed/proposed by Maklin
37mm/50 Bethlehem - 1910 export gun no other designation I know of

30mm/75 Unknown Mark - 1997 Gun of the Mark 46 Bushmaster II
30mm/75 Mark 28 - 1968 Swiss Oerlikon Gun for the Emerlec-30

28mm/75 Mark 2 - 1932
28mm/75 Mark 1 - 1929

25mm/87 Mark 38 - 1987 Gun of the Bushmaster I

20mm/99 Unknown Mark / M61A1 - 1998 Gun of the Mark 72 Block 1B Phalanx
20mm/76 Unknown Mark / M61A1 OGB - 1969 Gun of the Mark 72 Phalanx
20mm/86 Mark 16 - 1975
Unknown Mark 5-15 Guns
20mm/70 Mark 4 - 1942 Swiss Oerlikon Gun
20mm/70 Mark 3 - 1941 Swiss Oerlikon Gun
20mm/70 Mark 2 - 1940 Swiss Oerlikon Gun
20mm/70 Mark 1 - 1939 Swiss Oerlikon Gun

 

[Tzoli]

Added some new gun designations and fixed some errors

 

[Scott Kenny]

For the 40mm/16 automatic grenade launcher, that's the gun designation as Mark 19, not the mount designation.

 

[A Tentative Fleet Plan]

Don't forget the Mk 18 and Mk 20 40mm Grenade Launchers

 

[Colonial-Marine]

I believe the mark designation for the navalized version of the Bushmaster II 30mm chain gun is Mark 44.

The monobloc construction 8" gun which had the Mark 32 designation might have been 60 caliber length. Later FMC brochures list it as such but they don't say it is specifically the Mark 32.
https://www.secretprojects.co.uk/attachments/imageproxy-1-jpg.609768/

Is there anything to suggest the 20"/45 caliber test gun was actually built or was it just a paper project?

 

[Tzoli]

I think it was under development by the WNT. The USN used that data to calculate gun and turret dimensions and weight for the 1934 Maximum Battleship studies.
Friedman mentions it in the WW1 Naval weapons book:

 

[Tzoli]

For the 40mm/16 automatic grenade launcher, that's the gun designation as Mark 19, not the mount designation.

Yes I've stated the gun designations not the mountings.

 

[Tzoli]

Don't forget the Mk 18 and Mk 20 40mm Grenade Launchers

Are these had the same /16 calibre barrel?

 

[A Tentative Fleet Plan]

Are these had the same /16 calibre barrel?

Chinn doesn't give barrel lengths in calibres, he does give them in inches, 6 inches for the Mk 18, and 13 inches for the Mk 20.

 

[Tzoli]

Chinn doesn't give barrel lengths in calibres, he does give them in inches, 6 inches for the Mk 18, and 13 inches for the Mk 20.

Well.. that is 40mm/4 for the Mark 18 and 40mm/8 for the Mark 20 if those barrel lenghts were correct

 

[Scott Kenny]

Well.. that is 40mm/4 for the Mark 18 and 40mm/8 for the Mark if those barrel lenghts were correct

The 40mm grenade launchers are considered (crew served) small arms, not cannons, so the barrel length in multiples of caliber isn't typically used.