Wilson Combat TRAWPS Hammer/Trigger Pin Set AR-15/AR-10 Stainless Steel Handgun/Rifle
https://www.tandktactical.com/shop/810025500580-wilson-combat-trawps-hammer-trigger-pin-set-ar-15-ar-10-stainless-steel-handgun-rifle-55485
https://www.tandktactical.com/web/image/product.template/55485/image_1920?unique=53f8bba
Locking pins are a popular, budget-friendly upgrade for hard use and full auto firearms which replaces the AR trigger or hammer pins.
