Those are marked differently as they are part of the qualified professional purchase program which is for law enforcement and several other occupations as well. On many items you can usually just search for the same model number with the LE left off and find it available for purchase to anyone, the price may just be different or include less/different accessories. More on the Qualified Professional program here: budsgunshop.com/qualified_professional_discounts.php

Not necessarily. LE means if you are a qualified professional with proper identification and proof then you may purchase that particular item as long as it is legal to do so.