The CMMG Detent & Pivot/Takedown Pins (CMMG part no. 55AFF51) are small, spring-loaded detent pins built for the AR-15 platform, sold as a 10-pack so you always have spares on hand. CMMG machines these detents to work with mil-spec pivot and takedown pins, the pins that let you separate the upper and lower receiver for cleaning or maintenance. Detent pins are notorious for launching across a workbench or range table the moment spring tension is released, so keeping extras in a range bag or parts box saves a build or a repair from stalling. It’s a small, inexpensive part worth having on hand for any AR-15 owner.

Key Specifications

• Ships as a 10-pack, giving you plenty of spares.
• Compatible with mil-spec pivot/takedown pins.
• Sized for the AR-15 platform.
• Works as the small detent that retains a pivot or takedown pin under spring tension.
• Ships at a light 0.012 lb, adding almost nothing to your order.

Frequently Asked Questions

How many pins come in this listing? It ships as a 10-pack of detent pins.

What do these detent pins do? They retain the pivot and takedown pins under spring tension so the upper and lower receiver stay locked together until you press them out.

Will these fit a standard AR-15? Yes, they’re compatible with mil-spec pivot/takedown pin systems.

Buy the CMMG AR-15 Detent & Pivot/Takedown Pins

A detent pin that launches across the room mid-repair is a rite of passage for every AR owner, and a 10-pack of CMMG spares means you’re never stuck waiting on a single part. Order it from our CMMG lineup, part of our full selection of AR takedown pins, from our Lubbock, Texas gun shop, and it ships fast to your door.