CMC Triggers GLOCK 43 9mm Luger Drop In Trigger Signature Flat Trigger Shoe Design Model: CMC Triggers has used all the superior traits from their AR platform triggers to create this new drop-in trigger for GLOCK handguns. This trigger uses the CMC patented "Signature Flat" design, and is an ultra crisp trigger with a glass smooth break, minimal lock time and positive reset. The overall geometry is downsized for an excellent fit in the GLOCK. It is a totally self-contained 1-piece assembly and is very easy to install.