There’s no “implication.” The fact is that the AR-15’s surge in popularity is the result of its use to murder a classroom full of little children, I stand by my point that it is very curious that while the proposed assalt weapons ban would be on a wide range of weapons, the surge in sales is heavily weighted towards AR-15 variants, even, apparently, if one accounts for its previous popularity. A perfectly logical hypothesis for that phenomenon is its increased profile due to the publicity given to the weapon around the Sandy Hook massacre.
Whether that’s because of the proposed assault weapons ban or not, the weapon is now famous and cmmercially popular in large part for its use in shooting children, even though your personal motive for buying one isn’t to go shoot children. If you don’t like that, well, that’s life.