Ruger Mark IV 22/45 250th Anniversary 22 Long Rifle 4.4in Threaded Barrel Pistol - 10+1 Rounds - The Ruger Mark IV 22/45 250th Anniversary is a commemorative .22 LR pistol featuring a 4.40" threaded bull barrel, 10+1 capacity, and special anniversary engraving. Its blued finish and polymer frame deliver reliable accuracy with lightweight, easy handling. Features Engraved; Factory Installed Scope Mount; Magazine Disconnect; Ambidectrous Manual Safety; Adjustable Sights; Threaded Barrel;