FosTecH is a family owned company in Southern Indiana. FosTecH is launching The ECHO drop in trigger for the AR-15 Platform. FosTecH also manufactgures that Origin Tactical Shotgun along with the Bumpski, DefendAR-15, and the Springless Akins Accelerator. FosTecH's modular aluminum bump fire stocks can fit the following: AR-15, AK-47 (milled and stamped), Saiga's, AR-10, and Ruger 10/22. (less)