As the title says... I'm getting the parts together to install Hogue over-molded floating forend on my AR build... The diagram for the AR shows a Barrel Retaining Ring (Snap Ring), as well as the Weld Spring and Delta Ring.... I know I don't need the weld spring and delta ring... and I'm assuming I don't need the Snap ring either, but I wanted to check with the experts to know for sure. I'll need to get one ordered if I need it. Anyone??? Thanks!