ok everyone i am here to update because my 7.62x39 shell extractor arrived form brownells! i popped it in the vz58 chamber and let the bolt slam forward,pulled back on the bolt handle and.....the extractor would not catch. after starring at it for a few minutes and inspecting the large gouges left in the extractors metal i realized the rear end of it was screwed on backwards.... i unscrewed it and flipped it over then let the bolt go forward. i had to put some pressure on the handle but was able to extract the shell on the first try! great success i recommend one of these to every red rifle owner.