Designed to be tough and reliable, the Smith & Wesson Sigma pistol can be disassembled quickly for cleaning, lubricating and inspection. Taking the gun apart lets you perform all the suggested maintenance while also getting an important visual lesson in how the pistol operates. Although the steps for field stripping the gun are simple, it is important to make safety a priority. Wear safety glasses in case any of the parts accidentally go flying, and always handle the gun as if it were loaded.
Put on safety glasses.
Press the magazine release button located on the upper-left side of the grip to remove the magazine. Gently pull the bottom of the magazine if it does not drop out of the gun on its own.
Grasp the slide and pull it back until it locks open to clear any remaining rounds. If there is a round in the chamber, it should pop out when the slide is pulled back. However, visually inspect the chamber, keeping the gun pointed in a safe direction at all times, to make sure there is no ammunition in the gun.
Pull the slide slightly back and then release it to close the slide.
Point the gun in a safe direction and pull the trigger to release the hammer.
Pull the slide backward about 1/8-inch, pressing down on the slide release, or "takedown catch," on both sides of the gun, which is located on the frame between the slide and the trigger, and then pushing the slide forward to remove it. Pull the slide off slowly, with your hand over the entire front, taking care not to drop the recoil spring, guide rod and barrel located in the slide.
Turn the slide over and lift out the spring and the barrel assembly. Be careful not to damage the spring by bending or stretching it.
- Always keep the barrel pointed in a safe direction, even if you are sure the gun is not loaded.
- Keep children and others at a safe distance, especially when removing the slide, since the recoil spring could suddenly fly out and hit someone.
- Work inside in a clean area so that dust and dirt don't get inside the gun while it is disassembled.
- Remove each part slowly and carefully, ensuring that no part is damaged.