Instruction: Given a question and the related document, predict if the question is answerable based on the information provided in the document. Output only yes or no.

Input:
Question: do the sight really work or are for show?
Document: i bought this gun because i wanted to have an extra gun for some friends and it was cheap didn't expect much out of it but i was surprised how well this gun works and its so light and the 3'' barrel is surprisingly accurate with good paintballs it competes with my tippman i just use jt splatmaster 50 cal. i could not be happier with this gun it was so impressive i bought two more so i could have one for myself too highly reccomended
The gun looks great, feels great and im expecting to have plenty of good times with it but the clear elbow that came with it only either attaches to the gun or the Hopper cuz one of the ends is alittle too wide. Not sure it that's its suppose to be a flaw or not so I'll need to find one for it since the Hopper from my spyder stormer I was hoping to pair it up with didn't fit either.still a great gun though.
Love the size of this gun. Came with a white and blue spring for changing velocity, tool free stripping makes this an easy to maintain marker. Shipped on time and exactly what I ordered.
It waz not what I espetied I got this for me and I put paintballs in it and the paintballs did not fit so I had to buy the paintballs that fit it and just a wast
Answer: no