I just need some quick help here. I don't know if the OD of an ANH barrel is 1.25" or 1.5". I keep researching and reading and I'm just getting more confused at this point. All of the plans I find are for 1.5" and I don't know what length the pipe is supposed to be either. Also, if I re-size plans from 1.5" to 1.25" the holes in the barrel aren't 7/16" either. Like I said, I'm totally confused. I'm sure someone here knows the exact answer to both OD and length or could point me in the right direction. Any assistance would be greatly appreciated. Thanks.