First person models clip through walls

As the title suggests, when you get really close to non-vertical walls, the first person model may clip through (see attached image). I may be wrong, but I don't think this could ever happen in MW.

(RM-1612 from redmine: created on 2014-07-01 by Miroslav Remák, , closed on 2015-10-20 by scrawl ., duplicates #2347 (closed))

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