This barrel extension for the MPA mini MAC-11 (MPA930T) serves a multitude of purposes. It lengthens the barrel for a safer shooting platform and provides a 3/4" diameter section allowing you to mount any type of AR-15 front gas block on the extension. With a single, dual, triple or quad rail style gas block in place, you can mount any number of optics, lights and lasers. The gas ports are designed to function as a flash hider and a brake, it directs gas away from the shooter and expensive optics attached to the rail.
Please note that you can not attach a front pistol grip to a pistol without a Class 3, "Any Other Weapon" license from the ATF.