Really??? As noted above, there are lots of LE officers who use G34/G35's on duty without issue, including Robert Vogel. Likewise, there is a USG organization that has used G34/G35 pistols in combat post 9/11 without problems...
Just like the G19 is the perfect size for off-duty/plainclothes/CCW use, the G34/G35 is great for duty use with a magwell and SF X300 light in place--in fact I generally prefer the G34/G35 over the G17 for such use.