Originally Posted by MGH
I like that the UTG can be mounted but I'm not sure if the S&W one can. Let me know what you guys think.
Check the related items under the S&W M&P. It looks like it can be mounted with an adapter to an AR or SUR, but I am not sure if it will have the hardware to adapt it to a pistol.
Saying that, I would personally go with the UTG as well, it seems to have more versatile uses and adaptions for mountings on both pistol and SUR.