Ok let me start by saying I took my new 30s to range today first 100rds and no problems, keep in mind I did not practice any trigger resets at the range. So all went well and now back at home after cleaning I did a quick triggers reset test and it failed to go fully into battery. Here is what it does if I hold the trigger pull the slide back and let it slowly go into battery then it fails but if I let the slide go hard and fast it does fine and the trigger reset goes as normal. Also when I let the slide go slow and it fails if I let pressure off the trigger some the slide will move into full battery. I don't know if this is normal I thought other 30S owners could chime in or even 36 owners. So I got my 30SF out and pulled the recoil spring and put it in the 30S and sure enough there is no FTRB no matter how slow or soft I let the slide go forward, I then put the 30S recoil spring in my 30SF and sure enough it does not go fully into battery. So is it possible the recoil spring is just not broken in enough? I was thinking the opposite and the 30S spring might be to light, this is the newer recoil spring that I think is in all the Gen 4's. I wish I would have done some trigger resets at the range and I think with the full force of actually shooting it will go completely back into battery. I'm not stressing it because I know the spring is causing it and also I had no problems at the range it's just I've never had a Glock do this or either I never noticed it before it was broken in enough. I don't know what to expect with this recoil spring any input would be great.