The SILENCERCO Hybrid 9mm End Cap (AC1412) fits on the front of the SilencerCo Hybrid Suppressor. The unit is made of solid steel and features a matte black finish. SilencerCo is a leading manufacturer in noise reduction devices and accessories. Suppressor technology has gained popularity in the US, and SilencerCo is blazing a trail. Product Specifications 9mm Caliber Steel Construction Black Finish