The G2Z is an excellent light.  Lighter than the Z2 and uses the same parts internally.  I carry one daily at work.  I like the ammount of light output by the P60 lens, and need the purity of color that the incandescent bulb provides.  I also have to go into electrical panels, and don't want metal around when they are potentially energized.  So the polymer construction is a plus.  As far as the NRA edition you show, same as the regular, but cheaper because not everyone a fan of the NRA.  I guess a lot of folks don' believe in supporting all the ammendments of the constitution.  I will go no further on that subject.  Anyway, a good light.  I like the lock out tali cap.  If you really want one, buy a G2Z off eBay and save a lot of money.  Cheaper price but same light.  Probably not the NRA edition though.    
_________________________
If only closed minds came with closed mouths.