Pivot and Take Down Pins for the KP-15 Polymer Receiver The KP-15 does not use traditional AR-15 take down and pivot pins. These pins have the springs and detents built into them, eliminating the holes for the take down and pivot pin springs and detents from the lower. These pins are included with EVERY lower sold. If you lose of misplace them they are available here as spares. Made in the USA of steel and black oxide coated. Also compatible with CAV-15 MKII, Sabre Defense SR-15, and Eagle Arms M-15P. Mfg: Ke Arms