MAG|Couplers use a series of teeth on both sides of the coupler to hold the coupler tight to the magazine body. They are designed to be very tight when installed and may require some force when being slid onto the magazine body. This fit ensures a solid pair of coupled magazines supporting the recoil of the platform.
A small amount of liquid dish or hand soap applied to the teeth of the coupler will greatly aid in the installation. For installation see our videos at the end of this FAQ.
Do not use any tools to install the couplers on the magazine. You only need your own strength to install them. You may risk damaging your magazine or the coupler if too much force is applied to the assembly.