The "C" models of Glocks have the built in compensators with slots cut in the top of the slide. Does reduce muzzle whip a fair bit, but you can't do any shooting from retention or else you'll catch the blast right in the face and bottom of the chin. Not good.
I see tons of Glocks in the middle east. Iraqi police are issued with them quite often, without holsters I might add until recently.
I use a G19 at work in Afghanistan, although I work for Sig as well, you take what you're given.
I used to run a range,
www.theshootingedge.com. We shot more ammo there from winchester than any other public rental range in North America, so take what I'm saying in that context. We had more Glocks break than any other pistol there. I'm talking a dozen over the 2 years I was teaching courses there, with pics of every single one to prove it. Now sure there was only one catastrophic blow up, and most of the failures were the guide rails for the slide that are little metal tabs set into the plastic of the top of the receivers blowing out. But when in Canada, it's a year long process to get a pistol over the border and back for repair from Glock.
As an aside, not one 226 or 220 from Sig went down with anything other than worn out springs in the high tens of thousands of rounds count. I can also tell you on good authority that Canada's special forces JTF-2 has never had a 226 fail. Ask any Police department armourer how many Glocks he's seen KB.
So long as the round counts are kept under 20,000, I've found the Glocks to be reliable enough, and the G19's we are issued have stood up real well to the dust, and they are accurate enough. Something a Delta guy told me last time over - the G19 barrel is too short for ANY grain of hollow point to work effectively, as the velocity is too low for it to expand properly, or at all, so you're better of just using FMJ/Ball as you won't lose any penetrating power like you would with the non-expanding HP. He was actually making fun of the US Gov DSG plainclothes guys nearby when one was talking about his ammo loadout.