No one can say for sure, it depends on how careful you were. Time will tell though. Why do you want to bob the hammer? Did you cut the hammer spring too? Sounds to me like a good way to end up with an unreliable rifle.
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together.
US Army 1966-69, VFW Life Member, Retired Geek