CMMG Inc Spring Detent Receiver Pivot/Takedown AR-15. The CMMG Inc AR15 Spring Detent Receiver Pivot/Takedown is a tough little spring made to withstand prolonged use while still retaining its shape. This spring by CMMG is commonly found in lower receivers but also functions as a pivot pin and takedown spring in many applications. You’re using the CMMG Inc AR15 Spring Detent Receiver Pivot/Takedown in new builds but why is it in new builds? Because you’re not putting your complete faith in just any spring; you need one that’s made for the environment you’re putting it through. You can trust the CMMG Inc AR15 Spring Detent Receiver Pivot/Takedown to keep your receiver open while firing and to keep small parts from bouncing around. Package Contents: CMMG Inc AR15 Spring Detent Receiver Pivot/Takedown CMMG Inc 55CA581: SpringDetent Receiver Pivot/TakedownAR15
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