5 inch/38 Mk.12 (127 mm)

Description

Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.

Vehicles equipped with this weapon

• USS Bennion
• USS Cowell
• USS Aylwin
• USS Fletcher
• USS Porter
• USS Somers
• USS Sumner
• USS Atlanta
• USS Helena

General info

Tell us about the tactical and technical characteristics of the cannon or machine gun.

Available ammunition

Penetration Statistics
Ammunition	Type of Warhead	Penetration @ 0° Angle of Attack (mm)
		1000 m	2500 m	5000 m	7500 m	10000 m	15000 m
AAC Mk.34	HE	36	36	36	36	36	36
Common Mk.32	SAP	121	102	83	71	63	55
SP Common Mk.46	SAPBC	148	125	101	87	77	68
AAVT Mk.31	HE-VT	36	36	36	36	36	36

Shell Details
Ammunition	Type of Warhead	Velocity (m/s)	Projectile Mass (kg)	Fuse delay (m)	Fuse sensitivity (mm)	Explosive Mass (TNT equivalent) (g)	Trigger Radius (m)	Arming Distance (m)	Tracer	Normalisation at 30° from horizontal	Ricochet
											0%	50%	100%
AAC Mk.34	HE	792	25	0.4	0.1	3,220	N/A	N/A	✓	?.?°	79°	80°	81°
Common Mk.32	SAP	792	24.49	6.0	5.0	1,150	N/A	N/A	✓	?.?°	48°	63°	71°
SP Common Mk.46	SAPBC	792	25.02	6.0	5.0	906.5	N/A	N/A	✓	?.?°	48°	63°	71°
AAVT Mk.31	HE-VT	792	25	0.0	0.1	3,220	23	457	✓	?.?°	79°	80°	81°

Comparison with analogues

Give a comparative description of cannons/machine guns that have firepower equal to this weapon.

Usage in battles

Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.

Pros and cons

Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.

Pros:

Cons:

History

Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: https://wiki.warthunder.com/(Weapon-name)/History) and add a link to it here using the main template. Be sure to reference text and sources by using <ref></ref>, as well as adding them at the end of the article with <references />.

Media

An excellent addition to the article would be a video guide, as well as screenshots from the game and photos.

See also

Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:

• reference to the article about the variant of the cannon/machine gun;
• references to approximate analogues by other nations and research trees.

External links

Paste links to sources and external resources, such as:

• topic on the official game forum;
• encyclopedia page on the weapon;
• other literature.