The Franklin Armory DFM Detachable to Fixed Magazine conversion kit is used for those states who are actively banning rifles with deemed evil features. Installing this conversion allows your HK pattern firearm to remain in compliance with the laws in your state. This particular device disables the magazine release feature and it does require you to remove your current magazine release in order to install.

Specifications and Features:
Franklin Armory DFM Conversion Kit 5581
Detachable Fixed Magazine Conversion Kit
Easily Converts Most HK platforms into a Fixed Magazine Design
Requires Disassembly of the Action to Remove
Suitable for use with Rifles Featuring Banned Features
California Compliant
Installation will require removing and reinstalling your Magazine release
Metal
Natural Finish

Fits:
Heckler & Koch 91/93/MP5 and similar pattern firearms