The Bond Arms Backup is a 9mm Luger derringer built around a two-tone black stainless steel frame. At 4.5 inches overall and 18.5 oz, it's genuinely compact without feeling flimsy. The 2.5-inch barrel and single-action-only trigger mean you need to cock the hammer before each shot - that's the nature of the platform. A crossbolt safety blocks accidental discharge during carry. Blade front and fixed rear sights give you a basic reference point at close range, where this gun is meant to operate. 
 

Key Specifications 

• Brand: Bond Arms 
• Model: Backup 
• Type: Derringer 
• Caliber: 9mm Luger 
• Action: Single Action Only (SAO) 
• Capacity: 2 rounds 
• Barrel Length: 2.5 inches 
• Overall Length: 4.5 inches 
• Weight: 18.50 ounces (approx. 1.16 lbs) 
• Sights: Blade Front / Fixed Rear 
• Grip Material: Black Rubber 
• Safety Feature: Crossbolt Safety

The Bond Arms Backup in 9mm attracts buyers who want maximum concealment and accept the 2-round limit as the price of that portability. The compact size and quality stainless construction get consistent praise - Bond Arms builds to a noticeable standard and the Backup feels solid in hand.

The 9mm caliber choice is generally seen as sensible for a last-ditch defensive gun: effective stopping power with manageable recoil relative to larger derringer calibers. Critics focus on the 2-round capacity, which is an objective limitation compared to any semi-auto or revolver. Quick follow-up shots also take practice given the SAO mechanism and derringer geometry.

The trigger pull weight runs heavier than most semi-autos, which affects practical accuracy under pressure until the shooter trains with it. New shooters sometimes find the learning curve steeper than expected. Overall it reads as a purpose-built backup or deep-concealment gun rather than a primary carry option.