whats the difference between the 995 and 4095 besides the barrel? I am asking because I recently picked up a 4095 and would like to put an ati stock on it and it is only available for 995.was told it would not fit. So I was just wonedering if it was just a matter of removing some material off of the stock in the barrel channel. Any info from someone who owns both would be greatly appreciated. I searched the forums before posting this and found nothing. Thanks for the help.