Ok, so its not actually a "red dot" sight, but i dont know what to call it. Maybe an "aperature sight"? (cod 5). Idk.
so anyway, its very easy to make, and if you modded a Nerf Longshot into an assault rifle (like i did), and dont want that crappy scope and dont want to just "pretend" you have a sight or glue one on, this is for you.
oh, and if you have a really cool awesomley painted longshot and you want to put an airsoftgun scope on it, you can use this.
UPDATE: Posted picks of the finished modded longshot. i think its pretty much awesomely awesome.
UPDATE #2: This was my first Nerf mod by the way. I wish i had documented it, but it was pretty tedious and trying to take pics would have been the end of me :P
UPDATE #3: Due to an unforseen amount of praise about the gun, If anyone wants to buy the gun in the pics, message me.
Step 1: Imma Cut You!
Ok, its time to cut stuff.
cut the bottom of the scope off. its really not hard and if you fail, then you probably cant read these words or understand life. maybe someday someone would make a play about you, and it would be called "FAIL".
now, cut some squares out of a plastic lid. look at the pictures for why
Step 2: Gluing
Plug in your hot glue gun. Glue the stuff together. once again, if you fail at this, you fail at life.
Step 3: Done
Good job. now go play with it and make PEW PEW noises.