JayDako

Okay, so at the thrift store I saw a box of nerf guns for $20 all together.  A Vulcan EBF-25, Recon CS-6, and one that just says Dart Tag on it but when I looked online it appears to be a Speedload 6.  All of these are complete and seem to work.  The few rounds in the box were in bad shape and I have no idea if they are even the proper rounds.  there are some pink ones with round black heads, red ones with red heads in a six pointed star shape, and pink ones with suction cups on top.  I know nothing about names of the bullets and which ones I should buy for which gun the next time I go to Walmart.  I want avoid jamming as much as possible.

Also, on the recon, I don't really understand how this flip-up sight works.  I know it is just me being dumb, but I don't get what this little round bit that slides up and down the sight is used for at all.

I don't know anything about modding or if I should even mod these in any way.  Can any of these be used with suction cup bullets so my 6 year old nephew can stick shots to walls?  He likes that.  The more round tip ones would be more for me and my friends.  I am tired of being stuck with his spare gun with the little bee on the logo.

Hey folks new here.  Years ago my dad was given a Secret Shot II as a gag gift.  Me and a kid I was babysitting were playing around and I think it got over pumped because now it wont fire.  This is now, many years later, I found it and decided I want to fix it but I have no idea where to start.  I know literally nothing about this stuff but I just want it to work.  

So yeah, Secret Shot II.  Totally stock.  Will not hold any air pressure to be able to fire.  Need to know how to fix this and I am totally a layman here.  I know nothing about the inner workings of this thing.