The PTRD-41 (Protivo Tankovoye Ruzhyo Degtyaryova) was the first anti-tank rifle to be issued to the troops in world war two. The Russians had apparently captured a number of Polish anti-tank rifles in 1939 and saw them as a useful weapon in dealing with enemy armour. The PTRD-41 was issued in late 1941 and was found effective at targets under 100m and under. It was a single shot weapon and at close range it could penetrate around 35mm of armour, but by 1942 the Germans had gradually started to increase the armoured thickness of their vehicles and when the Tiger and Panther became available the PTRD virtually obsolete. It was still retained and issued to anti-tank rifles companies.