Wehrmacht History 1935 to 1945


Sponsored Links

My Other Sites

Sponsored Links

5 cm BK


5 cm BK

Service Data

In Service: 1943 to 1945

Production Data

Manufacturer: Rheinmetall-Borsig
Number built: 300

Technical Data

Type: Bordkanone

Calibre: 50 mm
Length: 4.342 mm
Weight: 540 kg
Rate of fire: 45 rounds per minute
Muzzle velocity: 920 m/s
Effective range: m
5 cm PaK 38
5 cm KwK 38
5 cm KwK 39
5 cm Flak 214
5 cm BK

Other: Armaments


The 5 cm BK (Bordkanone 5 cm) was designed by Rheinmetall-Borsig for primary for use against Allied heavy bombers so that defending Luftwaffe pilots could fire at a much greater distance, making their defensive fire less effective, secondly use was in the anti-tank role on the Eastern Front, The 5 cm BK was modified from the 5 cm KwK 39 Kampfwagenkanone that was being used in Panzer III's and Armored Cars. A few modifications were needed to turn 5 cm KwK 39 into an aircraft weapon the most notable alteration was the provision of an automatic cartridge feed, which formed a circular belt at the rear. since the 5 cm BK did not have a reciprocating belt to feed the cartridges, a compressed air driven rammer was designed into the rear of the gun, which allowed a 50 mm cartridge out of the feed belt and into the gun breech and run it into the chamber for firing. Aircraft that used the 5 cm BK were as follows Me 262 Me 410 Ju 88. However the experimental installation of the 5 cm BK into the Me 262 was not continued probably due to the fact that the weapon kept jamming. On the whole this weapon was extremely effective.

The 5 cm BK (Bordkanone 5 cm) anti-tank cannon was installed in the following Luftwaffe aircraft.
Messerschmitt Me 262
Messerschmitt Me 410
Junkers Ju 88


Leave a Comment




CAPTCHA Image Audio Version Refresh


The Warplanes of the Third Reich.
ISBN-10: 0385057822

Flying Guns World War II.
ISBN-10: 1840372273

German Aircraft Guns WW I WW II.
ISBN-10: 091196410X

For a complete list of sources
WWII News articles from around the world

Sponsored Links

WWII Timeline
World War Two Timeline, detailing every event, day by day from 1935 through to 1945.
WWII Timeline

Support This Site
There are many ways to help support this site if you would like more information
Click Here

Join Our Newsletter
To receive the latest news on Book Reviews, Movies and site updates join my free Newsletter

Sponsored Links

Sponsored Links

Bookmark & Share
Please bookmark this site and tell your friends!
Bookmark and Share

This website is NOT meant to promote Nazism, the politics of Adolf Hitler, or any other political ideology. It deals with the subject of German military during a particular period of history nothing else.

©Wehrmacht History

Reliable Web Hosting