Ummmm they do have a custom shop. http://www.magnumresearch.com/bfr_precision.asp
the wait isn't a year, only four weeks. I contacted them yesterday, as I am ordering one next month. after I get some money from barry. they will pretty much make anything (caliberwise) you want. several options available. since some people are concerned about the market MRI is missing there you go. I don't think most people get BFR's to shoot at 600 yards. some people are very good with them. see 44man. different guns do different things. show me a six pound rifle I can shoot a 725 grain slug in for 830 dollars that is under seventeen inches in length