Armaspec Fire Selector Detent w/Spring SS. The Armaspec AR 15 Selector Detent is made from stainless steel ensuring it remains in prime condition even after regular use. This prevents the safety selector from slipping to an unsafe mode before you are ready to fire helping you stay safe when on the range. Specifications for Armaspec Fire Selector Detent w/Spring: Manufacturer: Armaspec Color: Stainless Fabric/Material: Stainless Steel Country of Origin: USA Features of Armaspec Fire Selector Detent w/Spring Machined from quality corrosion resistant stainless steel Package Contents: Armaspec Fire Selector Detent w/Spring Armaspec ARM138-SS: Fire Selector Detent w/Spring SS