There are restrictions on them bringing a firearm into the country, and there are restrictions on them buying firearms, but I'm pretty sure borrowing a gun for a hunt is legal. And as ST said they will need to buy a hunting license, I also think they still need a hunter safety course.
"If your plan is for one year, plant rice.
If your plan is for ten years, plant trees.
If your plan is for one hundred years, educate children."