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: Has anyone used the 2x optical doubler, and if so, can they comment on it's quality?
Document: I've used an EOtech and if you don't want to drop around 500-1000, this is the best option. The 2x doubler is a great addition as well. You won't be disappointed with this purchase.
Mounts are solid, sighted in quickly, no problems at all. I have not used the doubler yet but at 100 yards, I don't need to. The dot is both small and bright.
This is a great red dot that won't break the bank. The 2x magnifier that comes with it has a small point of view, but functions well. I'm able to hit a paper plate consistently at 100 yards (without the 2x magnifier). I would recommend this to anyone interested in a red dot.
The clicks per adjustment aren't as clear as I'd like but they're okay.- Easy install. This scope comes with everything you need to install it.- Comes with 2x doubler. I don't use it much but this doubler is nice to have in case you're wondering what it would be like to have a 2x red dot- Automatic shutoff. If you leave the scope on too long, it turns off automatically so you don't burn out the batteryCons- Battery.
GOOD POINTS:1) Switchable between red and green dots at the touch of a button2) 2x doubler/magnifier included free3) Easy to adjust brightness (up/down buttons)4) Auto shutoff feature (which is unfortunately necessary due to the on-button that's easy to bump).5) Like any red dot sight, it's faster and more accurate than iron sights.BAD POINTS (many!
Whether the unit is turned on or not, gaining a sight picture with the iron sights is easy through the Strikefire. I prefer the green setting over the red, as the dot appears clearer to me and makes less of a halo around the edges of the field of view. Of the shooters who have used mine, about half agree with me, and the other half prefer the red.I've only used the included doubler for a few full magazines, but it seems to work better in brighter light.
I added the picture of the smashed box. The seller shipped the box inside a soft envelope via USPS and the box was very smashed. I took it out and didn't see any visual damage. The sight itself seems well built atleast for being a made in china aimpoint clone. I looked around quite a bit before ordering this for my 9mm carbine because it looked like a good value and included a good ring and a 2x doubler.
Brightness adjustment is easy as well. Comes with a 2x doubler, but I don't think I will ever actually use it. The being said the unit itself is a good enough value as it is without the doubler. The unit also has an auto shut off feature which comes in very handy. Although I haven't had to use it, most rate the customer service of the manufacturer as top notch. I would recommend it.Edit: I have also mounted this on a forward carry handle mount on a Colt 9mm.
Best bang for your buck! I would recommend this red dot to anyone who was in the market for a quality affordable sight.
I highly recommend this scope to anyone looking for something decent that wont break their bank. I bought this for my Bushmaster M4 and lets just say I am impressed. The quality is great and it looks even better mounted on the rifle.
Answer: yes