TKB-408 was a precursor to which heavily-modified Kalashnikov rifle as selected by the Red Army?
TKB-408 The TKB-408 was an early gas-operated prototype bullpup assault rifle with a tilting bolt. It was created by German A. Korobov and submitted to a set of official trials conducted in 1946 to select an assault rifle for the Red Army. None of the designs submitted to these trials were selected, although the AK-47 that was later adopted was a heavily modified variant of Mikhail Kalashnikov's AK-46.
Bor rifle The Bor is a Polish bolt-action 7.62×51mm NATO and .338 Lapua Magnum caliber sniper rifle. The weapon received the code name Alex during development, after the name of the lead designer Aleksander Leżucha, creator of the 12.7×99mm NATO Wilk anti-materiel rifle. After the development phase, the rifle received the military designation 'Bor'.