OK fair enough, maybe it wasn't realistic to suggest shooting in the peripheral limbs, but I know the IRA aimed for kneecaps perfectly adequately during the 'Troubles', so my suggestion is predicated on real life conflict.
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Ha ha ha ha! Wait, are you serious? You think the IRA shoot or people's knee caps while in a fire fight?
If you want to be really impressed with 'combat' marksmanship I'd suggest reading up on the Katyn massacre; somehow those guys were speed enough to shoot all the Poles in the back of the head. Those NKVD executioners must have been even better shots than the IRA punishment squads!