Estonia Sako Steiner a
The modular TRG M10 is a bolt-action magazine-fed rifle that is capable of caliber swapping on the fly via barrel/bolt/mag changes, swapping between .338 Lapua Magnum (8.6x70mm in European parlance), 7.62 NATO, and .300 Win Mag. All the tools needed to swap between calibers are stored in compartments in the bolt knob and forend. (Photo: Sako)