So I am trying to find out if anyone knows what size o - rings are in the standard Airforce Texan 457? Any information is greatly appreciated. What I'm trying to do is replace the Airforce standard o - rings with green helium rated o - rings so I can shoot dry air , nitrogen gas as well as helium when I want that extra power when deer hunting for flatter shooting slugs at longer distances and obviously more fpe. Yeah I know I could get the T - Rex in 457 and that's the plan but for now helium will do the job if I can figure the size the o - rings are in the standard Texan long air rifle 457. Thanks for any information given in advance. Much appreciated.
