Your Upper is held in place by pins in the Lower at the front and the rear; this little fella is for the rear and it is the shorter of the two pins. It has a round shape but still can only go in one way due to the detent track.
If you are frequently opening or changing your Upper in the field, you might like our Enhanced Pivot & Takedown Pin Sets.
- Made in an ISO 9001:2008 factory
- Blackened steel
- (1) Take down Pin
- All Mil-Spec lowers
- All Mil-Spec uppers
- All Mil-Spec takedown pin detents
Tools required: Slot screwdriver of hex key to remove the grip
Installation notes: Remove the grip via the fastener inside, the takedown pin detent and spring will drop down with gravity. Now simple swap in the new pin.