Vyacheslav Ivanovich Silin (Russian: Вячеслав Иванович Силин; 22 February 1907 – 20 November 1975) was a leading Soviet weapons engineer.
His work was halted while he served in the Red Army from 1931-1932, but throughout the rest of his life, he was a leading figure in the engineering and construction of military technology for the Soviet Union.
Silin produced several important weapons for the USSR, both through his own engineering work and under his direction.
Most notably, whilst working at the Central Bureau for the Construction and Research of Recreational and Hunting Weapons during the 1960s, he was directly involved in the creation of the main armament for the BMP-1 and BMD-1 infantry fighting vehicles - the 73mm 2A28 Grom.
As chief designer at the Central Bureau in Tula from 1960 until his death, Silin spearheaded the development of anti-tank grenade launchers.