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: How does this attach to my AR ?
Document: No matter what you have in auto this seems to attach and work. I've tried it and I like it.
Save the effort of chasing down spent cartridges at the range. Attach this device and be a shooter that is considerate of others nearby.
It was on time, packaged well and was easy to attach. A lot more convenient than picking brass off of the floor for reloading.
Easy to attach, actually works low price. What more can I say.. it does just what it is supposed to do, keeps your brass from going all over the place.
As a reloader I save my brass and hate having to scavenge it off the ground. This seemed like a good solution. Not so,  In order to attach it without interfering with the rifle operation it isn't close enough to catch the brass reliably.
It needs to have another attachment strap in the back to be able to catch all of the brass. It tends to sag in the back. Having 2 straps to hold it in place would be better. I am going to have to try to attach another strap to this before it will adequately do the job.
If I cared more I would have gotten it perfect. It caught most of my brass but started to move around a little after about 40rds. I retightened it and it was ok. It has a zipper on the bottom so you can dump brass without removing it. Depending on how you attach it you may have better results.
I have used this on 2 different ARs and it worked flawlessly on both of them. The rectangular loop is long enough that it covers the extraction deflector and that assists holding it in place. It's easy to attach and remove - I honestly did not use the zipper, I just pulled it off the firearm and dumped the cases out of the opening.
Bought one for my M&P10. I imagine it would work better with an AR15. the .308 rounds just seemed to be a bit much for it between recoil and weight of rounds. Also, it is a pain to attach if you have anything mounted to your rails that is remotely close to your mag well (i have an angled fore-grip). Would NOT reccomend for AR10 of any kind.
The concept of this brass catcher is fine, but when you attach a reflex sight along with a magnifier on a monolithic rail,  it becomes unusable unless you modify the Velcro strap towards the center of the frame. A good improvement for this flaw would be to have some openings on the metal frame so you can make adjustments for a better fit. I will typically leave the zipper open for the casings to fall out in order to minimize on weight.
Answer: yes