Representative implementations of devices and techniques provide a backer latch attachment system for various field-adaptable holster arrangements (such as for handgun holsters, for example). In the implementations, the backer latch attachment may be used to couple various carrier components together and/or to a holster backer to form holsters in various configurations. In various embodiments, the backer latch attachment includes a male latch support arranged to receive and to support a feature of the carrier and a female lock cover arranged to trap the feature to the male latch support.