The military industrial complex certainly has to have something to do with this. Not making enough money on international wars? Ok, let's go sell to domestic

The military industrial complex certainly has to have something to do with this. Not making enough money on international wars? Ok, let's go sell to domestic police forces. I would love to hear if anyone here knows for certain if there is a link between companies selling to US military for international war and the companies selling these contraptions to domestic police forces.