The Sig Sauer 226 9mm MK25TB or Threaded Barrel is a combat handgun by which all other combat handguns are measured. The legendary Sig Sauer 226 is a full size 15rd 9mm semi auto handgun proved quickly that it deserved a spot at the top of the list for reliable, accurate, and smooth shooting handgun. The MK25 as this model became known as, was offically adopted as the U.S Navy S.E.A.Ls issued handgun. With this adoption the Navy did get a few changes done to the handgun, a true 1913 picatanny rail under the frame for mounting lights or laser, 3-dot night sights adorn the top of the Nitron coated stainless steel slide. To help resist salt water corrosion the interals have all been parkerized as well as the slide stop, decocker lever, hammer and trigger which just adds to the "to Hell and back reliability" that Sig has been known for. For those who have gone through the extra steps to get a tax stamp for a sound suppressor, the Sig Sauer MK25TB comes with extended threaded barrel with 13.5x1LH thread pitch commonly found on European handguns. The Sig Sauer MK25TB comes with 3-15rd magazines and a plastic hard case.