spyder shutter with smart parts teardrop barrel and sure shot red dot sight
it is accurate and has 2 light modes, one is brighter, so when it isnt as bright you can use the low power mode to save on batteries, which only cost $3
you can keep both eyes open, the tube is bigger than the picture looks it is big enough to see very clearly through, i wouldn't recommend it if you have a vertical feed hopper cause that kind of defeats the purpose, my shutter has powerfeed, and it easily fits over the top of my powerfeed. it is easy to adjust and works really good if you have an accurate barrel. it doesn't wiggle at all if you tighten it on correctly. i have snipered many people with it, but it is kind of a waste if your more of an assault paintballer, i like to sneak up and snipe people which it is exellend for.
mine has never been hit so i don't know how durable it is , but it seems like it is pretty durrable, it also comes with a warranty -if it breaks they will replace it for $8 for shiping and handling
there really is no difference between the hundred dollar ones and this one except the hundred dollar ones are made out of metal, which doesnt matter anyways. it is an accurate sight, it is better than just a regular sight because you can adjust it to where you paint goes. it is definily worth it if you like to take sniper shots