This ban kept the PPK out of US shops until Walther came up with the PPK/S variant to beat the ban. Walther paired the frame of the PP with the slide and barrel of the PPK to make it 1.8 oz (51 g ...

That is, unless you use an OxTS INS with gx/ix tight coupling technology. Gx/ix allows our INS devices to maintain RTK and PPK level accuracy even if the number of visible satellites starts to drop.