The Ruger Mark IV 22/45 Lite is a semi-automatic rimfire pistol designed to be rugged reliable and accurate for years to come. In addition to the favored one-button tool-free takedown of the Mark IV series the 2245 Lite features a top-mounted Picatinny rail threaded barrel and ventilated receiver made from lightweight aerospace-grade aluminum. The polymer-framed 1911-style grip employs a serrated frontstrap and stippled backstrap for a positive no-slip hold.