I got 2 pump kits from JonesGunWorks on Ebay. Well, actually I ordered two and got 1 and a half. One of the pump guides was missing. I suspected something was amiss when he messaged me several days after I purchased and asked if I wanted a pre-2k and a 2k. I told him, no, I bought 2 pre-2k kits. To top it off, THEY DON'T WORK! The pump guide will not thread all the way into a body. To top that off, his design does not incorporate an o-ring, so even if the guide screwed all the way in, I doubt it would hold air. If you can't already tell, this has been a nightmare of a transaction.