The Smith & Wesson 642 Airweight in .38 Special +P is a 5-round double-action-only revolver with an aluminum alloy frame, matte silver stainless steel finish, and built-in Crimson Trace Lasergrips. It weighs 15.5 oz (439 g) with a 1.875-inch barrel. 
 
Key Specifications 

• SKU: 163811 
• UPC: 022188638110 
• Brand: Smith & Wesson 
• Model Name: 642 Airweight 
• Caliber: .38 Special +P 
• Action Type: Double Action Only (DAO) 
• Capacity: 5 rounds 
• Barrel Length: 1.875 inches (4.8 cm) 
• Overall Length: 6.3 inches 
• Weight: 15.5 oz (439 g) 
• Frame Material: Aluminum Alloy 
• Finish: Matte Silver Stainless Steel 
   
  Detailed Features 
  The aluminum alloy frame reduces weight without sacrificing frame strength. The stainless steel barrel and cylinder resist wear and corrosion. Crimson Trace Lasergrips are built into the grip panels, activating on draw for fast target acquisition in low-light and stress situations. The snag-free enclosed hammer prevents catch on clothing during a draw, which matters on a carry revolver. The design is rated for continuous +P use, allowing higher-pressure rounds without accelerated wear. 
   
  Target Audience 
  Concealed carry shooters, backup gun users, and anyone who wants a simple, lightweight revolver for personal defense. The DAO trigger and snag-free design make it a reliable pocket carry option. 
   
  Usage Scenarios 

1. The compact 6.3-inch overall length makes it well-suited for pocket or IWB concealed carry. 
2. Home Defense: Laser sights and revolver reliability work together for fast, confident response. 
3. Sport Shooting: Works at the range for defensive practice and accuracy drills with .38 Special loads.

The Smith & Wesson 642 Airweight Lasergrip .38 Special +P gets positive reviews overall, particularly from carry-focused users.

The light weight is the most praised feature. At 15.5 oz, it carries comfortably all day in a pocket or IWB holster without adding noticeable bulk. Owners consistently mention the compact dimensions as a primary reason for the purchase.

Revolver reliability and mechanical simplicity draw strong endorsements. Fewer moving parts compared to semi-automatics means fewer failure modes, and owners who rely on it for defensive carry value that characteristic. The .38 Special +P capability gives owners access to effective defensive loads with manageable recoil.

The Crimson Trace Lasergrips divide opinion. Many owners credit them with improved accuracy under stress and for shooters with difficulty using traditional sights. A smaller group finds the laser activates too easily, leading to faster battery drain than expected.

Trigger pull criticism comes up with some regularity. The double-action only pull is on the heavier side and some owners pursue a trigger job or professional smoothing. The 5-round capacity is the other consistent criticism. Shooters accustomed to semi-automatic capacities note the limitation, though most carry-revolver users accept it as part of the tradeoff.