taken from wikipedia.The Steyr TMP (Taktische Maschinenpistole/Tactical Machine Pistol) is a select-fire 9x19mm Parabellum caliber machine pistol manufactured by Steyr Mannlicher of Austria. The Magazines come in 15 or 30 round detachable box types. A suppressor can also be fitted. The Steyr SPP is the civilian variant of the TMP which has no foregrip and is capable of semi-automatic fire only.
InThe Steyr SPP (Special Purpose Pistol) is a semi-automatic variant of the TMP. The TMP's barrel and barrel jacket lengths were increased slightly so there is a greater length of protruding jacket and barrel. The forward tactical handle was removed and a small Picatinny rail installed on the forward handguard instead. It is somewhat large for a pistol and is constructed mainly from synthetic materials 2001, Steyr sold the design to Brügger & Thomet who developed it into the Brugger & Thomet MP9.