Suppressors w/ vs w/o o-ring barrels for a TI-Rant 45?

[raider1v1]

I have found with the 1911 and m&p9 pistol barrels, they mention they are threaded for a suppressor without an o-ring. I think that the ti-rant does have one. Is that correct? Does it matter for the barrel?

The barrels that I am looking at are:

1911 - http://www.midwayusa.com/product/14...d-muzzle-with-thread-protector?cm_vc=wishList

m&p 9mm - http://www.midwayusa.com/product/18...d-muzzle-with-thread-protector?cm_vc=wishList

I have a ti-rant 45 on order and need to get a barrel for a M&P 9 Pro in 9mm and a drop in barrel for a 1911 if thats possible.

 

[karb]

Also need to know.

 

[stik]

Check out this video: http://www.youtube.com/watch?v=GEPMFlDyTOo&list=UU07I7-OAOjoNvtzSWZlUGSw&index=4

It looks like the O-Ring bears on the barrel past the threads on a 1911 type barrel. That video has the best information I've seen regarding the Tirant 45. I'm waiting on one as well.

 

[raider1v1]

So he's talking about the o-ring at 9:55. I think from his explanation it doesn't really matter right?

 

[stik]

That's the impression I got from it. It should work fine with barrels that are not made for an O-ring and the pistons for metric threaded barrels designed for an O-ring use two rings.