Nov 27, 2011 · You mention 2 kit fast build 20mm assume you mean HAT models. At $15.25 for a two pack ($7.62 each) they are more expensive by far then PSC, ZvOKAYda, or Old Glory/CD decision vehicles. mparing the price of FOW is like picit the most expensive single 20mm kit and then saying all the 15mm are cheaper.