In the Spring of 1986, Whitehall sent weapons clandestinely to some units of the Mujaheddin, and made sure their origins were open to speculation. The most notable of these was the Blowpipe missile launchers. These had proved a failure in the Falklands War and had been mothballed by the British army, but were available on the international arms market. Around fifty Launchers and 300 Missiles were delivered and the system nevertheless proved ineffective; thirteen missiles were fired for no hits and it was eventually supplanted by the US Stinger missile. The mujaheddin were also sent hundreds of thousands of old British army small arms, mostly Lee Enfield rifles, some of which were purchased from old Indian Army stocks. They also included limpet mines which proved the most successful, destroying Soviet barges on their side of the Amu River.