5000bb G36 box mag

Box Magazine for the G36 which can hold 5000 rounds from first factory with trades. Requires internals from a 470rd G36 hicap magazine in order to work. You slide the internals from a g36 high cap into it and it turns your 470 high cap into a 5000 round box magazine Never used and is brand new. Can post. Can take bank transfer or PayPal