20-K (45 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. Make an air or ground vehicles list on which this weapon is installed in our game.

General info

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

Available shells

Penetration statistics
Ammunition	Type of warhead	Penetration in mm @ 0° Angle of Attack
		10m	100m	500m	1000m	1500m	2000m
BR-240	APHEBC	68	66	58	49	41	35
O-240	HE	4	4	4	4	4	4
BR-240SP	AP	72	70	61	51	43	37
BR-240P	APCR	103	94	64	40	21	17

Shell details
Ammunition	Type of warhead	Velocity in m/s	Projectile Mass in kg	Fuse delay in m:	Fuse sensitivity in mm:	Explosive Mass in g (TNT equivalent):	Normalization At 30° from horizontal:	Ricochet:
								0%	50%	100%
BR-240	APHEBC	760	1.43	1.2	15	32.3	+4°	48°	63°	71°
O-240	HE	343	2.15	0.4	0.3	118	+0°	79°	80°	81°
BR-240SP	AP	757	1.43	N/A	N/A	N/A	-1°	47°	60°	65°
BR-240P	APCR	985	0.85	N/A	N/A	N/A	+1.5°	66°	70°	72°

Comparison with analogues

Give a comparative description of cannons/machine guns, that have firepower equal to these type of weapons.

Usage in battles

Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against the main 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

Summarize 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 this weapon. If the historical reference turns out to be too big, take it to a separate article, taking a link to an article about the vehicle and adding a block "/ History" (example: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>, as well as adding them at the end of the article.

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 weapon;
• other literature.