Smith & Wesson - Model 610-3 Stainless Steel Barrel: 3.875" Caliber: 10MM Capacity: Features a 6-round capacity cylinder. Because 10mm Auto is a rimless semi-automatic cartridge, the revolver utilizes metal moon clips to hold the rounds together, ensuring proper headspace and reliable extraction. Frame: Built on Smith & Wesson's heavy-duty stainless steel N-Frame Custom Hogue Cylinder Release Grips: Custom G10 Laminate Wood Grips With Finger Grooves for recoil control Sights: Adjustable Rear Target Paired With A Fiber Optic Green Front Sight Eleven Moon Clips