CMMG Receiver Detent, Pivot Pin & Takedown Pin Spring

The CMMG receiver detent and spring set is a small but essential part of the AR-15 lower receiver assembly. This detent and spring work together to secure the pivot pin and takedown pin in place, providing the tension that keeps pins from walking out during operation. These parts commonly wear out or get lost during disassembly and maintenance, making replacements a necessary item for any serious AR builder or armorer.

Manufactured from hardened steel with a corrosion-resistant finish, these CMMG detents and springs are built to MILSPEC dimensions for reliable fit and function. Installation is straightforward for anyone familiar with AR lower receiver assembly, though a detent installation tool or slave pin can make the process easier and prevent launching small parts across your workspace. These are drop-in replacement parts that require no modification or fitting.

• Part Type: Receiver Detent & Spring Set
• Compatible Firearms: AR-15 Platform
• Material: Hardened Steel (Detent), Spring Steel (Spring)
• Finish: Corrosion-Resistant
• Installation: Drop-In (Basic Armorer Skills Required)
• Includes: Detent & Spring