I just tried with a friend , damn matt , i didn't knew you lierally meant reversing IR3 ....   Incase you guys didn't noticed yet , Improved rifleing actually REDUCES your range instead of increasing it , i was playing with ursus for a while and it felt like i needed quite a bit of shots to kill my enemies so i  tried on a friend just to see .     Yep , URSUS is a 5 shot to kill at 50 meters WITHOUT ir3   , and a 5 shot to kill only up to 43 meters WITH ir3