the hk93 or hk33 uses one pin to hold the stock on like the mp5. a CA33 stock might be a better fit. The mp5 stock is all plastic and has overmolded lips the slide over the back where the g3/33 both have metal caps which have the plastic stocks screwed screwed on from the inside. This might not mater if the g3 stock comes with pins because your old pin might be too long. This is irrelavent to the discusion but if it ever becomes a question, CA and TM G3 stocks are not compatible without modification.
mateba
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