The Ruger SR22 is a compact DA/SA semi-automatic pistol chambered in .22 LR. Model number 3606 has a 3.5-inch barrel, 10+1 capacity, and weighs 17.5 oz. Overall length is 6.4 inches and height is 4.9 inches. The polymer frame is purple and includes a Picatinny rail; the aluminum slide has a black anodized finish. 
 

Key Specifications 

• Model Number: 3606 
• Caliber: .22 LR 
• Action: Double Action / Single Action 
• Capacity: 10+1 rounds 
• Barrel Length: 3.5 inches 
• Weight: 17.5 ounces (1.09 lbs) 
• Overall Length: 6.4 inches 
• Height: 4.9 inches 
• Frame Material: Polymer with Picatinny Rail 
• Slide Material: Aluminum with Black Anodized Finish 
   

Features 

The DA/SA mechanism gives you a heavier first-shot pull from decocked and a lighter pull for follow-up shots in SA. Adjustable 3-dot sights handle varying light conditions and distances without needing aftermarket work. Interchangeable rubberized backstraps let you fit the grip to your hand size. Ambidextrous manual safety and a crossbolt safety are both on board. At under 18 oz. the gun doesn't tire you out during longer range sessions.

Owners of the SR22 in purple tend to appreciate both what it is and what it isn't — a light, easy-handling .22 that works well for new shooters and for practice without burning through expensive centerfire ammo. The DA/SA trigger gets good marks, recoil is minimal, and the adjustable sights are a plus for a gun in this price range.

Two recurring criticisms show up in discussions: feeding can be picky with certain ammunition brands, so it rewards some experimentation to find what runs reliably. Shooters with larger hands also note the grip can feel small after extended sessions. The purple color polarizes opinion, though most people who buy it specifically seek it out for that reason.