I did a search and I have some questions regarding the Jet Funnel system thingy. I do these nights called skill and drills and I'd like to have a magwell (jet funnel) for my H&K. I know you need to use the extended mags but where do you get them? I find all kinds of regular mags but no mention of mags for the Jet Funnel. Im winning a JF on ebay but he says nothing about the mags? Thanks.