Krale Airsoft Shop talks about the different Maxx Model Hop-Up units they have at their shop... "The hop up is THE most important part in an airsoft replica, and of course you want as little play or inconsistency as possible. The Max Model hop up units may offer the solution for your replica. Praised not only for the consistency and precision they offer, but also for all their additional functionalities.

Today we discuss the latest line of hop up units from Maxx Model, namely the M4I, M4W, M4P and M4A."