https://techcrunch.com/2018/07/31/trump-promises-to-look-into-legalization-of-3d-printed-firearms/

Last month, the U.S. government reached a settlement that makes it legal to post plans for 3D printing fire arms.This morning, the President tweeted an objection to the ruling, a day before it’s enacted. “I am looking into 3-D [Printed] Plastic Guns being sold to the public,” Trump wrote. “Already spoke to NRA, doesn’t seem to make much sense!”

While the law doesn’t officially go into effect until Wednesday, its pending legality has already led around 1,000 users to download plans to print AR-15s, according to CNN,  citing a stat from Pennsylvania AG Josh Shapiro.