I am thinking about going the Jet funnel route with my USP fullsize 9mm. But the problem is that I have 13 mags for the 9mm. and after I go with the jet funnel, they will be useless with it on. Some one convince me that the $350 or so to buy a jet funnel and 5-6 mags is worth it. Plus I would like to hear any feedback on the jet funnel and the mags, be it positive or negative. Gun is well used as a back up off duty weapon and goes into the hunting woods with me everytime. So someone show me a little HK love and talk me into it. Thanks.