The Gun Gamers do an airsoft hop-up range test, pitting the Hop Systems R-Hop against the Krytac Bucking... "Today on Gun Gamers, E House and Kyle do an outdoor range test to see how the Hop Systems R-Hop drop-in kit compares to an equivalent setup using the stock Krytac bucking in Eric's customized Krytac AEG. This test is obviously not super scientific, but we think it shows a couple of points very well, which are discussed in the video!

If all you care about is seeing the results, you can skip to 30:01 in the video.  If you want to watch the full testing footage, watch the whole thing."