Now for some master class in airsoft hop-up units. The hosts of Airsoft Action TV, Gadge and and Anvil explain more about the Rhop, Flat Hop, and the Standard Hop in this episode and they test them out for you to appreciate how they work... "In which Anvil and Gadge test out the effective range of Stock Hops, Flat Hops and RHops in a stock UK legal AEG. Our test gun is an LCT AKS-74 which fires at around 1.1J with a 0.20g BB with the hop set.