The Dark Mountain Arms Stow Away is a semi-automatic pistol chambered in 9mm with a 5-inch threaded barrel. The SA121 model designation appears across vendor listings. The threaded barrel is noted in both available titles. 
 

Key Specifications 

• Brand: Dark Mountain Arms 
• Model: Stow Away 
• Caliber: 9mm 
• Action: Semi Auto 
• Barrel Length: 5 inches 
   

Detailed Features 

• Semi-automatic 9mm pistol 
• 5-inch threaded barrel 
• SA121 model designation 
• "TB" (threaded barrel) configuration noted in vendor titles

Owners of the Dark Mountain Arms Stow Away tend to be buyers looking for a 9mm pistol with a threaded barrel from a smaller manufacturer. The 5-inch threaded barrel is the standout specification, and it draws interest from those who want a suppressor-ready platform without paying a premium for a more established name. Feedback on build quality is limited given the brand's lower profile, and some owners note that parts and support availability can be harder to find than with larger manufacturers.

The ergonomics and handling of the Stow Away are considered straightforward by most owners, though the design does not receive the same level of community discussion as more widely distributed pistols. Those who have run the pistol extensively generally report reliable function, but sample sizes in owner communities are smaller.

Value is the typical driver for purchase. The Dark Mountain Arms Stow Away appeals to buyers who want a threaded 9mm barrel at a lower cost than comparable options from larger brands. Those who prioritize aftermarket support or long-term parts availability tend to look elsewhere.