Instruction: Given a question and its related document, determine if the question is answerable by analyzing the information in the document. Output yes if the document addresses the question, or no otherwise.

Input:
Question: does this need CO2?
Document: great bb gun, great feel  when shooting. the only thing is i wish i could purchase more mags, I need more mags please help me, overall best bb shooter out on the market!! !
Happy with the gun, Took almost a month for delivery, Maybe the supplier should have used a different shipper.Gun performs well, however seems to run out of CO2 quite quickly.Overall performance is excellent, Great fun.
out of all of the bb,and airsoft guns that I own, this is my favorite. kicks like a mule not to heavy
one word, inaccurate. But a different pistol like a daisy powerline 15xt which is very accurate and conserves more co2.
i had this bb gun for 8 months now and still works the blowback is awesome the only negative side is that the gun is a little inaccurate which is no big deal  great for plinking very durable
When I was looking to buy a bb gun I primarily wanted an affordable full metal gun that had a sense of realism to it.
The hammer is in but doesn't really work, the blowback action is pretty nice, lots of power in this airgun, the port is not cut and the magazine is plastic, not very accurate, it shoots a lot of bb's per co2 tank, the look is great, very hefty and solid, but I really like it. For the price is another good buy from Umarex.
Sure, there are design elements I would have executed differently if I had an Asian airgun armory under my directive. I would have made the clip out of metal (does the plastic one work? Well, yes, it does.) I would have cut the ejection port on the factory model (can anyone with access to a dado blade cut it themselves? Why, yes.)
Pretty fun toy. Lots of noise and lots of recoil. I have been unable to get accurate with it. Not sure if it's me or the recoil. Have had friends try it with the same inaccuracy. But if you like noise, recoil and not reloading after every shot, for the price, pretty fun
It's not bad BB gun, but I have an other BB gun it is SIG Sauer P226. SIG P226 much better!In HPP I don't like plastic magazine
Answer: yes