The Leatherman Replaceable Firearms Disassembly Punch is for removing detaining pins and other similar functions. You can use this tool alone since it is removable or with the hammer end of the MUT. In addition, the threads on this punch are designed for adapting cleaning rods and brushes to help you get the best cleaning you can get.
Note:
The EOD model features a C4 punch in place of the firearms disassembly punch