Ring Beam Unit

Nintendo Official Guidebook for Metroid Other M pg. 166 are small, swivelling turrets installed in the BOTTLE SHIP's Bioweapon Research Center in Metroid: Other M.
==Description==
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.
At the time of Metroid Other M's release, the projectiles fired by Ring Beam Units had exclusively served as defenses for Mother Brain in previous entries in the Metroid series. Thus, the turrets' presence on the BOTTLE SHIP served as a foreshadowing of the eventual confrontation with the android that carried a copy of Mother Brain's AI.
==Official data==
===Nintendo Official Guidebook for Metroid Other M===
"Placed on walls, they aim at Samus and fire using a Rinka. The Rinka can be destroyed."
==Trivia==
*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 tracking projectiles similar to Rinkas.
*Ring Beam Units are closer in appearance to the cannons that defend Mother Brain and Central Units rather than the actual mechanisms which spawn Rinkas for the latter two entities. The mechanisms are block-shaped generators but are nonetheless referred to as turretsSuper Metroid Nintendo Player's Guide pg. 111 or cannonsMetroid: Zero Mission: The Official Nintendo Player's Guide pg. 74 in certain media.
==Gallery==
JP Other M Guide 166.jpg|Nintendo Official Guidebook for Metroid Other M page 166
Bioweapon Research Centre Rinkas HD.jpg|Rinkas fired from Ring Beam Units
==References==
ru:Пушка Кольцевого Луча
Category:Turrets
Category:Indestructible Creatures
Category:Bioweapon Research Center
Category:BOTTLE SHIP
Category:Galactic Federation technology