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: Can this be placed firm directly on a Glock 17 slide without a mount in between?
Document: This is a nice little sight. I do wish that the switch was better. It would be nice to have a separate on-off switch and another switch to select the brightness level. Nice low mount on my 1911 slide, without the rail (directly screwed to the slide).
I think the slide mount adapter actually weighs more than this sight. Seems very nicely built. Ability to change the battery from the top without removing the sight is a nice upgrade from earlier models (although I haven't had to change it yet). Be aware the sight picture is pretty small so it takes a little practice finding the dot quickly.
I mounted this on my FNX tactical .45 it mounted no problem. Have to use the plate that comes with the pistol hardware kit. The FF3 will mount without the plate but, the light sensor on it will be covered up by the slide due to it sitting lower in the slide. I have used it on a friends FN 5.7 also. All I can say is it works great. Holds its zero!
@ around $250 for the sight and glock mount amazon has the best price. The only thing Burris could do to improve this and make it 5 star would be switch to a dual illuminated system like the Trijicon RMR, make it in the 3 moa, and keep the current price point.
Bought this for my XDM-40 long barrel. Requires purchase of mount separately. Burris is rated to withstand the recoil of riding atop the slide. Have not put a lot of rounds through since mounting, but have had great results with other Burris products. Good visibility and easy acquisition. Hope it can take the shock!
I had this attached to my Springfield Range Officer 1911, however the Novak Mount that I needed did not work correctly on my slide. I love the way I can acquire a sight picture with this, I just wish I could use it on my 1911. I may buy a mount for my XDm and mount it on that. The XDm has a better mounting surface. I will re-visit this review once it gets put on my XDm.
package came it on time no damage in the packaging installed it on glock 34 easy to use and sighting it was easy looks good on my glock
Mounted on a glock 21sf, love it, 200 hundred rounds later still holding true. Would buy another one for Taurus Raging Bull 454casull
The 3 MOA red dot is sharp and clear and, after a short period of getting used to it, I was able to quickly get it on target without any problem. I highly recommend it.Daryl in Montana
very satisfied with this product ..took it to the range is mounted on a glock 10mm,glock-20 full size with a lonewolf 6.61''threaded barrel with lonewolf muzzle brake..shot full power 200grs. and regular 200 grs...THIS BABY STAY ON TARGET AND TOOK THE RECOIL LIKE A MAN''.
Answer: yes