I am a newbie here, and have searched for a posting about this issue, but have not found even one.
I have owned a Colt Sporter since '96 but never registered is an a AW. I just bought a Rock River lower (LAR-15) which is not yet on the list, and wanted to know if I can take my complete Sporter upper and put it on the RR lower, of course using the sporter internal lower parts on the RR lower.
This would allow me to, when the time comes, register it, and I would get my gun back into legal status. I do not want to be breaking the law.
What are the issues with these two parts fitting and how/ what do I need in order to make them work together? I have heard a number of things about the offset being different on the Sporter vs. Mil Spec.
Please help, and thanks in advance!