Tested accuracy of guns while hip firing at a controlled 15 meters with 3 tests of 100 shots each and recorded the average in increments of 5% there is room for error from my ability to keep control of recoil so results may differ from person to person and also will differ when in combat from having to react on the spot
ASSAULT RIFLES
AE4 55-60%
BAL-27 60-65%
Ak12 45-50%
Arx-160 65-70%
HBR3a 45-50%
IMR 50-55%
Mk14 70-75%
SUBMACHINE GUN
KF5 60-65%
MP11 55-60%
ASM1 65-70%
SN6 50-55%
SAC3 45-55%
AMR9 70-75%
HEAVY WEAPONS*
EM1 100% (direct energy laser but touchy to stay on target hip firing)
Pytaek 30-35%
XMG 55-60%**
EPM3 60-65%
Ameli 30-35%
* was tested while continually firing accuracy is higher with shorter bursts of fire
** while XMG is under lockdown mode the accuracy is 100% even at 25 meters and with minimal recoil