I'm reluctant to mess with the Blackfeather because I have no gunsmithing tools and don't know squat about replacing the ORG or the ATF paperwork that must be done.
The paperwork was easy and Frank @ M14.ca will help you with it.
The kit includes DIY instructions for installing the ORG, and there is information about
its installation on the net. I hired a local smith to install mine, he did it in just a few minutes.