Sorry if this has been posted before but Question, new SOT 2 here and am working on a test full auto AR. Just ordered a M16 stripped lower with the pocket cut and all. Is all I need for the “full auto” aspect just a full auto sear, drill the 3rd hole, then just full auto lower parts kit. Then obviously I’ll fill out the forms, but on the building side am I missing anything? Thanks for any help.