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L2 R2 Trigger Springs Button Set Replacement Part for Sony Playstation 4 PS4 | eBay
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Multi-Colors Luminated D-pad Thumbstick L1 R1 R2 L2 Home Face Buttons – eXtremeRate Retail
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PlayStation 4 controller - R2 trigger has came off one of these little hinges (more detail in comments) : r/fixit
Black 5 Pairs L2 R2 Plastic Trigger Replacement Parts Buttons For PS4 Controller | Wish
Ps4 Controller Dualshock 4 Parts | Ps4 Pro Controller Buttons - L1 R1 L2 R2 3d Thumb - Aliexpress
How to FIX BROKEN R2 + L2 Buttons on PS4 CONTROLLER (Button Replacement) - YouTube