"You're asking me to give something up. What is your side willing to give up in exchange?"
Rev's question is a true compromise, as noted by AD's definition... what do we get?
suppressors
automatics
explosives
large bore weapons
federal reciprocity of ccw
and state exemption of overtly restrictive laws
True compromises like this are more interesting. In day to day life, these changes wouldn't make much difference for many. But if 29% are expecting armed civil war in their lifetime to protect civil rights, then these might be appropriate compromises to stock up in preparation for such an awful epoch.
Crime & terrorism probably won't be affected. In some ways, entry level introduction to firearms will become more difficult due to the increased cost and time for training and background checks. It is easy to underestimate the impact this has to the movement and culture as a whole.
On the whole, I find this to be a balanced return for loss. My biggest issue with it, is the introductory costs this creates. This is a problem for 2 reasons, #1 it strangles the movement over a period of decades, which is a risky move for us #2 it imposes a "poll tax" on a human and civil right, which is bad on principle.
Until actual details were created and judged, I would consider it plausible but suspicious.