If you sell it to them in Indiana, its not your problem where they take it when your finished.Its legal, its only illegal if they bring them back into IL, but that's on them, not you.
That's not to say the state won't try to sue you if you sell a lot of mags though.
Additional 2,100 Illinoisans not subject to state’s gun ban after latest TRO:
Additional 2,100 Illinoisans not subject to state’s gun ban after latest TRO
(The Center Square) – About 2,100 more Illinois citizens are now safe from the state enforcing Illinois’ gun ban against them after a third temporary restraining order was issued Wednesday.www.thecentersquare.com
Nah, they voted for it. Don’t sell…
taxpayers pay for both sidesFourth order against gun ban enforcement issued as taxpayer costs defending law grow:
Fourth order against gun ban enforcement issued as taxpayer costs defending law grow
(The Center Square) – When the myriad cases against Illinois’ gun and magazine ban will be resolved remains unclear, but what is certain is taxpayers are footing the bill.www.thecentersquare.com