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I'm sitting on one that has more than a miniscule chip on it. Columbus Machine must see enough of them to quote a price for repair. The "effect on functioning" is in how you look at it. By...

And yet op rods become damaged, chipped, bent, etc. "Ammo alone". What does that mean? That they weren't stepped on? The evidence is clear--some types of ammo deliver higher doses of energy into...

Op rods can bend between the tube and charging handle if pressures too high. Lead edge of cam slot can chip off. Rod can dismount if the rail lug is worn and undersized. These things can happen.