Not true. The currently required Combination Type AFCI's (AWAH) do not have the 30ma gfci built in.Well I have seen them work however since all afci breakers have 30ma gfci built in, except GE, it is sometimes the gfci doing the work but that is a totally different function.
UL 1699 Scope 1.3 These devices are not intended to detect glowing connections.A breaker will detect heat if it is generated at the breaker location but a small arc may not be detected by a breaker until it is too late.
A person named F. Pashchen in 1889 published a law which sets out what has become known as Paschen's Law. He determined the relationship between breakdown voltage, the gap between two metal plates, and the pressure. With air as the gas, the minimum voltage is 327V. The peak of a 120VAC sine wave is only 170V, and thus continuous low current arcing is, by a law of physics, not possible with copper-copper. Thus claims that a Combination AFCI will respond to arcing at a break in a conductor or a loose connection flies in the face of a law of physics.