I am building/assembling my first AR-15. Bought all the parts over the last six months and hope to have it complete soon. I was told that I have to fill out a FA-10. I know when you buy person to person or otherwise you have 7 days to turn the form in. My question is, when I bought the lower receiver was I supposed to register it then or when the rifle is completely assembled. Right now it's in pieces but soon it will be operational (I hope).
Thanks
Thanks