The Dark Mountain Arms Stowaway is a single-shot pistol chambered in 5.7x28mm with a 5-inch barrel threaded 1/2x28. It holds 1 round and ships in a black finish. 
 

Key Specifications 

• Brand: Dark Mountain Arms 
• Model: Stowaway 
• Caliber: 5.7x28mm 
• Action: Single Shot 
• Capacity: 1 
• Barrel Length: 5 in 
• Color/Finish: Black 
   

Detailed Features 

• Single-shot configuration in 5.7x28mm 
• 5-inch barrel with 1/2x28 threaded muzzle 
• Compact pistol form factor 
• Black finish 
• 1-round capacity

Owners of the Stowaway tend to be enthusiasts drawn to the novelty of a single-shot 5.7x28mm pistol in a compact package. The threaded barrel is a frequent reason for purchase, making it straightforward to add a suppressor, which pairs well with the cartridge's characteristics.

Practical feedback is limited given the niche nature of the platform. Those who buy it as a range curiosity or truck gun appreciate its small footprint, but single-shot operation means it is not a first choice for anything requiring fast follow-up. The trigger and overall build quality draw mixed reactions, with some owners satisfied and others noting the fit is basic for the price.

Value is the most debated point. Dark Mountain Arms is not a widely recognized name, so buyers weigh the Stowaway against more established single-shot designs and often pay a premium for the 5.7x28mm chambering rather than the brand itself.