I think you have an ammunition problem from the sound of it. Get a box if "good" ammo from Walmart (Remington/Winchester etc) or other source and try it. It seems not to be the magazines due to the fact you have tried three of them. If there is no drag when you pull it back by hand and let it go loading a round. Probably weal ammunition that is failing to cycle the weapon. If that doesn't work and the rifle is new send it back.
The Constitution is not an instrument for the Government to restrain the people. It is an instrument for the people to restrain the Government!
“Americans have the right and advantage of being armed. Unlike the people of other countries, whose leaders are afraid to trust them with arms.”
James Madison. Author of the 2nd Amendment