I did buy a original replacement spring the same weight as the gun came with I thought mine was worn out when it started crushing the brass, but it did it with both of them I did consider going down on the spring weight, keep in mind too this gun crushed the brass with ONLY a apex trigger kit and night sights, and I returned it to factory trigger and tried it and it still crushed brass, I only added all the other parts because I figured if I'm gonna replace everything I mas well upgrade them and the ram I was talking about is APEX tactical Reset Assist Mechanism, R.A.M., the gun seems to fully function normal except for the spent casings hitting the top front of the ejection port on the way out ill try ordering another recoil spring this time a lighter one