The Trailblazer Firearms LifeCard is a single-shot .22 LR single-action pistol that folds flat to credit-card dimensions: 3.375 inches long, 2.125 inches tall, and 0.5 inches thick when closed. It weighs 7 ounces. 
 

Key Specifications 

• Model: LifeCard 
• Caliber: .22 LR 
• Action: Single Action 
• Barrel Length: 2.5 inches 
• Capacity: 1 round 
• Length (Closed): 3.375 inches 
• Height (Closed): 2.125 inches 
• Thickness: 0.5 inches 
• Weight: 7 ounces 
• Materials: 
  • Barrel, Bolt, Trigger: 4140 Pre-hardened Steel 
  • Frame, Handle: Aluminum (100% machined billet) 
• Finish: Corrosion Resistant Isonite Steel / Hard Coat Anodized Aluminum 
• Safety Feature: Will not fire when closed 
   

Features 

The LifeCard is machined from billet aluminum and 4140 pre-hardened steel throughout — no cast or polymer parts. The Isonite-treated steel and hard-coat anodized aluminum hold up to corrosion. The built-in safety is passive: the pistol physically cannot fire while folded, which removes any accidental discharge concern while pocketed. It is ambidextrous by design. At 7 ounces and half an inch thick, it disappears in a pocket in a way nothing else in .22 LR can.

The LifeCard generates predictable but honest debate. Most buyers know what they are getting: a last-resort pocket pistol, not a primary defensive firearm.

The compact size and flat carry profile get universal praise — nothing else in .22 LR fits this discreetly. The build quality is well-regarded; the machined steel and aluminum feel solid. The passive folded-closed safety mechanism is considered a thoughtful design choice.

The main criticism is caliber. .22 LR is a real limitation for self-defense, and single-shot capacity makes it even more of a backup-only option. Some users report reliability concerns over extended use, though the design is simple enough that failures are infrequent. Pricing relative to other single-shot .22s is sometimes noted as high, though most buyers factor in the unique folding form factor. Overall the consensus is that it fills a genuine niche — ultra-deep concealment when nothing else works — but it is not a substitute for a proper carry gun.