High Quality Content by WIKIPEDIA articles! The Ruger 10/17 is a semi-automatic rimfire rifle chambered for the .17 HMR round. Its maker, Sturm, Ruger Co., Inc., announced the rifle on January 16, 2004. The Ruger 10/17 was essentially a Ruger 10/22 WMR model modified to fire the .17 HMR round. Similar to the 10/22 WMR model, the 10/17 had a hardwood stock, a steel receiver with integrated scope mounts, and a nine round rotary magazine. The 10/17 has a slightly longer barrel than the 10/22 WMR model (20" vs. 18.5") but a shorter overall length (37.25" vs. 38.5").