So I ordered from urmarex the pellet probe o rings for my gauntlet 2 22. Pricey for sure so I got a dozen. When received the invoice product code was for a 177 caliber and the o rings looked so small. So I called C. Farrell back at urmarex he was the one who I ordered from and he told me that the o rings for 22 and 177 are the same size- that it doesn’t matter!!!! Hmmmm! They we really hard to get on- 3 split while installing and after sweating it out I got 2 on and consider amount of blow by! Have I been lied to from a manufacture Rep???