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Mainspring, Fits Pre-1995 HW50, Beeman R8, Marksman 40
other products by Air Venturi
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Things I liked: Fits my pre-1995 Weihrauch HW50S perfectly.
Things I would have changed: I would have liked to have seen disassembly instructions, or better yet a video.
What others should know: Be careful unscrewing the main tube end piece because the main spring puts it under pressure. You need to relieve the pressure before completely unscrewing the end piece otherwise you risk stripping the last few threads.
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