Ruger 5718 SP101 Standard 357 Mag 5rd 2.25" Satin Stainless Steel Black Rubber w/Synthetic Insert Grip. The Ruger SP101 revolver features a smaller Ruger cushioned grip system with no exposed metal at the back strap for shooter comfort. The patented triple locking cylinder mechanism securely locks the cylinder into the frame at the front, rear, and bottom. Its stainless steel frame has no weakening side plates. This model has a 2.25" stainless steel barrel, fame, and cylinder. It also has a black rubber grip with a black synthetic insert and black ramp front with an integral rear sights.