Instruction: Analyze a question and its supporting document. Predicting answerability based on the information provided in the document. Output yes if the document contains relevant information to answer the question, otherwise output no.

Input:
Question: Is this the short barrel or the long barrel?
Document: This is an accurate and powerful gun that gives you the familiar feel of an AR15. I got shipped the NPS short version, but am happier because of it. The trigger needs improvement. It is too long, heavy and doesn't break clean, and that's after much adjustment. Be sure to shoot it at least 25 times before mounting the scope becuase the piston slams around really hard at first and can crack the scope mount.
Gun is great... scope leaves a bit to be desired. Use the heavier pellets. It takes great effort to cock the barrel. Most kids would not be able to.
I want to like it more than I do. First, it's loud, really loud. I have two spring piston rifles & bought this, in part, based on the advertising that said it's Nitro compressed gas cartridge is significantly quiet than spring units. This rifle is louder. Also said Nitro is easier to cock the barrel - it's much harder due in part to the shorter barrel. Probably 38 lb or more required to cock the mechanism. Like cocking a crossbow.
very accurate, fun to shoot, i love it, no problems whatsoever!!!!!!! the tr177 is powerful and takes out it target at will, reminds me of an old muzzle loader......i love it!!!!! !
this was not what i ordered. this was a part of my order...!optic was brake; a lot of scratches; handle damaged; so i was very unhappy with my order
i love this gun, because its nitro piston. I have the spring piston which is also very good gun. I haven't try the nitro piston rifle yet, but  I am very positive about it
YUM!
Plenty of power! Easy to use! We love it!!!! !
One of the best 177 cal. shooting right on bulls eye on first try out.so happy i decide to purchase this one.
Let me begin by saying that I am retired Air Force Military Police and I own 3 different .177 pellet rifles. This rifle out performs both the &#34;Ruger blackhawk&#34; and the &#34;gamo big cat&#34; . The nitro piston makes it's about 20 percent quieter but it still sounds like a .22.My suggestion: get a bipod, and a $40 UTG scope and dial it in.
Answer: yes