Integrally suppressed carbines are nothing new"" however this quiet little shooter is the first one that folds in half. Like its predecessors"" the SUB CQB offers compact storage and superior pistol caliber firepower"" however this one is ""Hollywood quiet"" when paired with subsonic ammo. The 9mm SUB CQB was developed with personal defense in mind. Integrated noise suppression offers a tactical advantage while protecting the defender from decibel chaos. We highly recommend you utilize the integrated picatinny rails. Add a combat light and quality optic to this quiet little protector for positive threat identification and target acquisition. This model is capable of using several different popular styles of magazine via the available for purchase interchangeable magazine releases.