50 ft
Long shot old
You most likely have some sort of problem with the new one. If it is the Longstrike, Recon, or Longshot, try removing the barrel. If it is anything else, than your old Nerf gun is really well-made and you should give kudos to whoever got it for you or whatever store you bought it from.
you stop being 5 years old and playing Nerf
About 41 years
depends what kind of Nerf gun. but your best bet is eBay.
it shoots over 20 feet.with proper modifications, it can reach 50 or more [nitemav mod]
it could be around 5 or more
You have to be at least 13 years old to enter in the contest.
It depends on where you are going to shoot. To shoot at a gun range I think the minimum age is set by individual states, but can be increased by rules set by the range. Normally, if you are shooting on property where it's legal for an adult to shoot and you have permission, as far as I know there's no restriction.
If you're looking to find out how to install Nerf bars on your Chevy truck, go to the installation tutorial videos on TruckChamp.com and also their Nerf bars page, which has a learning center. The videos are great because they show a 65 year-old woman installing Nerf bars. Their motto is "If a 65 Year-Old Woman Can Do It, You Can Do It Too!"
It depends on which site. NerfHQ Wiki is accurate, but provides little information. The NerferWiki is pretty much a rehash of NerfHQ Wiki. The two Wikia wikis are the most accurate. Nerf Blaster Wiki has a lot of small pages, but includes info about non-nerf, old blasters, accessories and Super Soakers. Nerf Wiki has less pages, but has more users and pages about new weapons and accessories, however there exists no info about non-nerf or old Super Soakers.
Yes that is normal. The same thing happened to me when I was 13. It just means that you aren't very far into puberty. Just give it time and it will 'shoot' out. Not every male can shoot when ejaculating. A lot of males sperm just seeps out. This is normal.