Quote:
Originally Posted by RainyEyes
Do not do anything to the hop up until you lower the FPS of the gun. The reason why it's overhopping is because the fps is too high. If you're using stock or upgraded hop up rubbers they'll still get torn apart because the bb is making contact with the rubber with too much force.
This leaves you with 2 options:
1. Lower fps aka swap the spring with an m90.
2. Tweak the hop up to make minimal contact so that it isn't making an immense parabola.
#1 is favoured over #2 because it not only prolongs the life of your hop up rubber but also your gearbox (slightly).
#2 is more of a trial and error situation because evidently if you reduce the amount of surface area exposed to the BB you reduce the damage inflicted, but you're still left with a hop up that degrades quicker over time and can result in over hopping.
What is the current FPS rating on the gun w/ .20 grams (if you have them, they are standard) or .25 grams WITHOUT hop-up?
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This is a GBBR, .25 bbs and it overhops on the lowest setting. The AGM M4 GBBR has the tendency to hit 450fps stock on a .2, so I am thinking that may be the problem. I am not certain about the fps.