This Rival Arms Smith & Wesson MP 9mm Precision Threaded Drop-in Barrel is not compatible with M2.0 models. I would recommend the Apex Tactical Specialties Grade Threaded barrel found using the following link:
https://www.opticsplanet.com/apex-tactical-specialties-grade-threaded-semi-drop-in-m-and-p-barrel.html?_iv_parent-gun-model=smith-and-wesson-m-and-p-9-m2-dot-0&_iv_gun-model=smith-and-wesson-m-and-p-9-m2-dot-0-5in
No. This Rival Arms Smith & Wesson MP 9mm Precision Threaded Drop-in Barrel does not fit M2.0 model handguns. I'd recommend the Faxon Firearms Smith & Wesson M&P Fullsize Flame Fluted/Threaded 9mm Barrel found using the following link:
https://www.opticsplanet.com/faxon-firearms-smith-wesson-m-p-fullsize-flame-fluted-threaded-9mm-barrel.html?_iv_parent-gun-make=smith-and-wesson
Yes, the thread pitch is 1/2 x 28
Yes, these are compatible with the gen 1 full size models.
it will stick out too far, these are for the full size 4.25" models.
This is for the 1st gen 4.25" models.
The manufacturer has not provided the overall length of these barrels, but they are meant to replace the barrel on the full size 4.25" models.