Timber Creek Outdoors ARTPST Takedown Pin Set AR-Platform Compatible w/ Mil-Spec Lower Tungsten
http://www.tandktactical.com/shop/816397023221-timber-creek-outdoors-artpst-takedown-pin-set-ar-platform-compatible-w-mil-spec-lower-tungsten-47729
http://www.tandktactical.com/web/image/product.template/47729/image_1920?unique=b75d8ae
These CNC machined pins are drop in replaments for Mil-Spec lowers and allow easier dissasembly of your rifle.