The Dark Mountain Arms SA100 Stowaway is a single-shot bolt action rifle chambered in 5.7x28mm with a 16-inch threaded barrel. It has a black finish and a compact, packable configuration. The threaded muzzle accommodates suppressor or muzzle device attachment. 
 

Key Specifications 

• Brand: Dark Mountain Arms 
• Model: SA100 Stowaway 
• Caliber: 5.7x28mm 
• Action: Bolt Action 
• Barrel Length: 16 inches 
• Color/Finish: Black 
   

Detailed Features 

• Single-shot bolt action rifle in 5.7x28mm 
• 16-inch threaded barrel 
• Compact Stowaway design 
• Black finish 
• Threaded muzzle for suppressor or muzzle device use

Owners of the Dark Mountain Arms Stowaway are drawn to the unusual pairing of 5.7x28mm with a single-shot bolt action in a compact platform. The 5.7x28 chambering in a rifle-length package delivers noticeably more velocity than a pistol host, which is the main draw for most buyers.

The single-shot format and compact Stowaway design appeal to minimalist shooters and backcountry users who prioritize weight and packability. Those who want a higher round count find the single-shot limitation a significant tradeoff.

As a small-manufacturer product, the Stowaway attracts owners willing to accept some rough edges in exchange for an unusual concept. Quality consistency is a common discussion point, with some owners very satisfied and others noting fit-and-finish variability across production runs.