Why not rent a first-class stapler at your local rent-all?

I second the motion. You can buy the crappy one for about the same
price as renting a good one, but unless you intend to lay a lot of
floors, owning the device makes no sense.

Check the installation instructions for your flooring. They may not
cover the warranty if you use staples. I can assure you that staples
will loosen up faster than nails.

--
Steve Bell
New Life Home Improvement
Arlington, TX USA