Here is an overview of the latest offering in HPA Airsoft, the RedLine N7 HPA Drop-in Kit, as done by Amped Airsoft... "Anthony is in the Amped studio today to give you guys a quick look at the brand new HPA offering from Redline Airsoft: The Redline N7, a true nozzle-forward biased system that may look like the other offerings on the market currently, but the function is quite different.