I've got a S&W 25-2 target model .45acp.Its a great gun,had some trigger work done,and is a great shooter.Heres the rub,I can't use it in IDPA.Does anybody make a 4" barrel for this,I've had no luck so far.Would rebarreling this be a mistake? I inherited it so i would like to keep it in compatition.Thanks for any input,Matt