This is a great shooting  9MM . I bought it from one of the Armorers from Sig Savers . These upgrades have been done to the gun . The following have been Polished feed ramp, hammer , sear, trigger bar locking block and barrell ejector . The hammer and sear have been honed . The slide has Nitride finish which is 56 rockwell . SRT Trigger not Short trigger . Also Crimsom trace Laser grips . You will not find one better.