L3 on left analog stick for PS4 controller finicky - DualShock 4 CHU-ZCT2U - iFixit
PS4 Controller Paddles For Playstation 4 Back Button Attachment For DualShock4 Joystick Rear Extension Keys Turbo Accessories - AliExpress
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Paddles for PS4 Controller, Back Button Attachment Vietnam | Ubuy
R3 and L3 on PlayStation 4 PS4 Controller - YouTube
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Amazon.com: eXtremeRate Textured Red Dawn Programable Remap Kit for PS4 Controller with Upgrade Board & Redesigned Back Shell & 4 Back Buttons - Compatible with JDM-040/050/055 - Controller NOT Included : Video Games
Steam Community :: Guide :: Dualshock 4 / PlayStation 4 controller configuration
Upgraded Wireless Controller for PS4 with RGB LED Button Backlight Compatible with Playstation 4 /Slim/Pro/PC - Walmart.com