I will not tell you bump firing is safe, smart, tried or any bs like that... I will say it can be unsafe.... But saying that, I have done it more then a few times and from the shoulder while being able to aim some what reliably with out a $350 stock. I had to prove this to a friend the other day to save him the money on the stock. Save your money and buy ammo. Many things can go wrong bump firing even with that stock, know this before you try.
Rain, snow or sleet.... Mud, sand and dirt.... My GLOCK will work ;)