The Sanna 77 is a South African semi-automatic submachine gun.
During South Africa's period of Apartheid, Rhodesia faced international sanctions and arms-embargoes in the 1960s, and as such, Rhodesia decided to make their own submachine gun based on the CZ Model 25; the first weapon to come out of all of this would be the Kommando LDP. Production would later move from Rhodesia to South Africa some time in the early 1970s, where from then on was handled by Dan Pienaar Enterprise Ltd, headquartered in Johannesburg.
Doomed from the start, the Sanna 77 was produced from 1977 to 1980, and was heavily plagued by reliability issues, legislative licensing restrictions and the fact that it was nothing more than just an over-sized semi-automatic pistol. Dogged by all these issues, the Sanna 77 failed miserably in the South African market and very few were made before all production was halted in 1980.
The Sanna 77 is very much like a semi-automatic CZ Model 25. While the Sanna 77 has been classified as a submachine gun, it technically isn't one as it is semi-automatic only and was meant for sale to the civilian market, and would be more correctly classified as a pistol-caliber carbine.