If you're looking for a definition of Sig Sauer's well-known unfailing reliability, look at the P220. In 1976, the .45 ACP P220 was introduced and quickly became recognized as one of the most accurate 45s right out of the box. Since that time the P220 has earned an enviable record in hot spots around the world. The P220R features a stainless steel slide machined from barstock and coated with a durable, wear resistant Nitron finish, a lightweight alloy frame with M1913 Picatinny rail, and the Sig Sauer four-point safety system of decocking lever, patented automatic firing pin safety block, safety intercept notch, and trigger bar disconnector. This model is Massachusetts compliant.