...In general, straw purchases are legal except in cases where the ultimate receiver of goods or services uses those goods or services in the commission of a crime with the prior knowledge of the straw purchaser, or if the ultimate possessor is not legally able to purchase the goods or services. In some jurisdictions, straw purchases are legal although the end user is not legally able to purchase the good or service himself or herself...
I'll just come out and say this. Cutting a pasting from Wikipedia and passing it off as legal advice is reckless and as to the quoted section, in reference to firearms purchases DEAD WRONG. HOPEFULLY, when people happen across this topic in the future, they will look at the posts by those who have actually researched the issue and will not rely upon this.
Sorry to be harsh, but this kind of thing can be dangerous and is irresponsible.
...I'm curious where you found this paragraph...
https://en.wikipedia.org/wiki/Straw_purchase