Instruction: Evaluate the answerability of a question by analyzing the related document, outputting yes if the document contains information addressing the question, and no otherwise.

Input:
Question: what is the best penetrating bb, copper plated or the zinc plated ?
Document: Just a tip and I already know some will disagree but, hey, it's just an opinion but based on what I've seen over the years in this hobby with regard to copper BB's versus zinc alloy or otherwise steel non-copper coated BB's. I gave up copper BB's years ago. Yeah, I know, the same "debate" exists between lead pellets [of various grain weights] vs PVC non-lead pellets and, IMO, their superior [PVC] penetration and high velocity advantages. Enjoy!Doc Tony
I have only had this bb gun for aa few days but so far it does what i wanted it for and has enought power to take care of the varmits i will use it on.
It is pretty powerful for a bb pistol in this price range. It is a gas hog, and the power starts to dwindle after about 50 - 60 shots and it seems to be getting around 80 shots per cylinder. I bought a bb gun laser sight at WalMart that fits it perfectly for $21. I've only had it for a week, but it's lived up to my expectations so far .
First off, this gun is very powerful for a bb gun, especially for a pistol. I have owned this gun for about a year and am now throwing it away due to an unknow problem with the rubber seal that caused co2 to leak. But don't get me wrong, I loved this gun while it worked, and a year of use is alright for $40. Like I said, this gun has great fps, which also makes it accurate for a handgun.
A bb and a platinum pellet by gamo weight real close to the same and from 25 feet the 5170 puts a bb the same distance through a phone book as the pellet pistol. I realize the impact dynamics on a steel bb as oppose to a lead (excuse me) expanding pellet are vastly different but the power of the 5170 is pretty strong for a bb gun. I also found the 5170 to be extremely accurate. Groupings the size of a quarter from 50ft. with brand new powerlet.
this waz da best deal of my life i will be buyin more things for my guns here n fact i just ordered more bbs today n i just got my gun today to n it came early by 1 day dat waz great ;]
I bought 2 of these about 6 months ago and both work as well if not better than the day i bought them!! Very powerful to. I was shooting at a thick randy mccnally map book, laminated and very thick. OK the bb's were going through it like butter!! it doesnot bounce off tree's, instead it will embed its self into the tree!! i own 10 air pistol's and rifles and by far for the money these has to be the best i would say!
"ALL THAT MEAT BUT NO POTATOES!" to me best sums up this 'piece'. The promise IS there. Mounts provided are loose and the very loose tec over sleeve would be ideal for red dot, laser, flashlight--if, and only if this light weight pistol could comfortably accommodate them.I recommend gluing it to the pistol to ensure stable platforms for accessory's. Trigger pull is hard, coupled with 'blow back design' only hampers, for me, any chance of accurate aim.
I have =3= of this exact same model hand-gun because, quite frankly, not only do all of them perform flawlessly  but I remain duly impressed with the gun's performance and high "no B.S." FPS delivery and BB penetrating power. And not to mention a very reasonable price with free Prime shipping!
this pistol is a must buy for those who enjoy a powerful yet extremly fun gun. AS ALWAYS KEEP YOUR BLADES SWIFT BUT YOUR MIND SWIFTER TYLER T.
Answer: yes