I have recently acquired a 2.0 full size 9mm. It's the threaded barrel version.

The previous owner put on Trijicon Hd's so it no longer has the suppressor height sights.

I want to get factory replacement 4.25" ??? barrel.. but some list the barrel as 4.22" online

Can someone confirm barrel size? I am in process of selling/trading my threated barrel w/ reduced weight RSA..

Thanks in advance..

Or is anyone has a barrel laying around.. Awesome.. let me know.

I’d look into an Apex or Barsto barrel if replacing.

I went the opposite direction on my 2.0 compact...non-threaded to threaded with suppressor and red dot. The barrel I settled on is made by Apex. I'm very happy with it as a drop in replacement. Since yours is a 4.25" barrel Apex has more choices than in the 4.0" so I suggest you at least check them out. What got my interest in Apex is they claim an increase in dwell time. Since mine is suppressed I figured a bit more dwell time on a longer platform can be a positive. It shoots very tight groups and I couldn't be happier. Be sure to post an update.

I wouldn't worry about a .03" difference in the "spec".

My quick look shows M&P 1.0 (or non specified) barrels show 4.25", one even listed 4 1/4". While the 2.0 show 4.22". All were sold out.

You may be able to find an Apex barrel at Brownell's or Midway or other such sites.