Hi please can someone help me with a guide on how to r hop or hop up consistentsy upgrades to a marui l96 hop unit I have lost the little rubber cushion or nub ? :s I have cut a piece of wire and am using this atm just to fill the gap however the accuracy and consistency is poo and not game worthy I would just like to get it so I can use it properly any help would be much appreciated it's a shame no one makes an upgraded hop unit for this gun or I would just buy a new one .