I looked over the Kimbers here and the 8400 has a larger safety than the 84M. In fact its size and operation are closer to a M70 than the 84M.

Its the 84M's safety on its much smaller action thats so easy to use. Also the top corner of its safety has its edge rounded so it does not dig into my thumb like the M70 and Dakotas.

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All guns should be locked up when not in use!