will Ruger use the old square style threads or the new v thread on all there new marlin336 barrels and receivers . Might be smart but I may want to replace a short barrel with a 24in barrel. I have 3 rifles here that were 35 remington they all have the 20 in. barrels I would like to replace one with the 24 in. and balard rifling and a full length magazine tub .. sure would be nice to just screw one on .. and being I already reload for 375raptor might be nice to have a 375 caliber barrel to play with .. I would have to make da m n sure I kept the ammo separate by using only nickel casings for the raptor 336..