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: Is the laser red or green?
Document: I love my lazer. lazers are the only way to go at night. That red dot changes what someone is thinking when they see the dot on their chest.
It's fairly simple to install if you have good eyes which I don't. But i managed to get it done with a little help. The main thing is that it puts out a strong red beam to your target!
I love my new laser rod. It is easy to install if you know what you are doing if not I suggest you YouTube it or use visual aid to prevent you from losing one of the pieces.
There does not seem to be a noticeable horizontal error at 60 feet. The laser does make for quick target acquisition, but as the distances increase, I need to learn how to assess and compensate vertically more quickly.
I really like how discrete it is, and how it does not interfere with other equipment.I also purchased a LaserMax guide rod laser for a Glock 26 gen 4, but I have not yet had it installed since it was delivered without the switch. LaserMax has been promising to mail it for several weeks now...
The LaserMax guide rod laser works like a charm in my Glock 19 gen 4. So far I have fired 400+ rounds with this laser without a single failure using mostly Federal FMJ 115gr from Wal-Mart. In fact, after 600+ rounds, I have yet to have a single failure with this Glock. LaserMax advertises +/- 2" at 20 feet. From what I can see, it is far more accurate that that.
Hopefully, the LaserMax design will not measurably reduce system life relative to the factory double-spring. It is unclear to me why LaserMax went for a single-spring system for the Glock 19 gen 4 when they use a double-spring system in the Glock 26 gen 4.My Glock 19 gen 4 laser was one of the first delivered: ordered in early-January 2013 and installed six weeks later. So far I have been very pleased with it other than the scraping and my long-term reliability concern.
great and easy to install
This is a replacement for LMS-1131P=gen 1-3 only. My glock 19 is a gen 4. No where in the description does LMS-1131P say anything about what gen it is. That listing, LMS-1131P, is deceiving and time wasteful. This newly order LMS-G4-19 is very specific as it should be.Please correct the old LMS-1131P ad to read gen 1-3 only. Thanks!
The new spring scraped on a polymer casting edge inside the receiver, making is noticeably harder to remove the slider. Now, after several hundred rounds and dry fires, that the polymer edge has been worn down and made flush, and the slider is now only slightly harder to remove than when the factory guide rod is installed.Glock moved to the double-spring system to reduce recoil and prolong system life.
Answer: yes