HIPERFIRE's AK trigger groups are precision devices that feature very low creep. AK receivers are typically less precise. Sometimes the small amount of creep is not enough to close the stock selector's gap with the trigger's tail when on SAFE"" allowing the firearm to be fired. HIPERFIRE's AK safety selector features an adjustable set-screw to close this gap so that SAFE means SAFE. The selector is compatible with stock AKs.