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Ring Beam Units (リングビームユニット?)[1] are small, swiveling turrets installed in the BOTTLE SHIP's Bioweapon Research Center in Metroid: Other M.


Large numbers of the Ring Beam Units have been installed in four long interconnected corridors leading to Room MW. They are completely indestructible, and every few seconds will fire Rinkas directly at Samus Aran.

The Rinkas move slowly but cause severe damage, and are more than enough to distract Samus from opening the many Multi-Lock Blast Shields blocking the path ahead. In addition, these particular Rinkas have lost their ability to pass through solid surfaces and instead bounce off of them, making them more dangerous. Samus can destroy them using her Arm Cannon or Screw Attack. If two such projectiles collide both will implode and vanish.

Official data[]

Nintendo Official Guidebook for Metroid Other M[]

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Warning: Fan Translation(s) Ahead

This article, section, or file contains text that is unofficially translated by Metroid fans. Some information (such as proper English names of characters or items) may not be accurate. If an official translation becomes available, the fan translation(s) may be replaced.

"Placed on walls, they aim at Samus and fire using a Rinka. The Rinka can be destroyed."


  • A similar turret appeared in Metroid Prime 3: Corruption. During the battle with Aurora Unit 313, there are mechanisms located on the floor that shoot red projectiles similar to Rinkas.
  • Ring Beam Units are very similar to the cannons used to defend Mother Brain in Tourian. In Tourian, Rinkas spawn from specific blocks; although these blocks are referred to as turrets[2] or cannons[3], they do not resemble Ring Beam Units and are most likely a separate type of mechanism.