AWP "breaking symptoms" / pistols for CQC

As above, what are exactly drawbacks of not repairing sniper rifles such as AWM?
When I damaged M16 it was decreasing accuracy, but with AWM I can'ts see any notice about what parameter is nerfed [no info on the weapon icon].

Also, speaking about pistols, which one you prefer for CQC: Anaconda or Deagle and _why_?

Thank you in advance.

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