No authority, myself, but near as I can tell from researching the net, the Sig SHR 970 is no longer in production and has not been for a good while now. Any new SHR 970 rifles, spare parts, and switch-barrels, that might still be commercially advertised is left over stock that was sold off to various dealers and at this point much/most of that has dried up. (I have one in 30/06)
