Description
Some rifles are built to sit in a safe. The Dark Mountain Arms Stowaway is built to go with you. This single-shot 9mm bolt action weighs a scant 2.8 pounds, and the detachable barrel lets it break down to under 17 inches, which means it slides into just about any daypack, kayak hatch, or truck bag without a fight. When it's time to shoot, the barrel spins back on and you're at a full 31.78 inch firing length in seconds.
Why the Stowaway Earns Pack Space
Dark Mountain Arms, a veteran-owned outfit making these right here in the USA, designed the Stowaway around simplicity. One round, one trigger pull, no magazine to lose or feeding issues to fuss over. The single-action design includes a half-cock position, and the aluminum, steel, and glass-filled nylon construction wears a corrosion-resistant finish that shrugs off weather. At under 2 inches thick when taken down, it packs flatter than most camp hatchets.
Suppressor-Ready and Optics-Ready Out of the Box
The 16.65 inch barrel comes threaded 1/2×28 with a thread protector installed, so adding a 9mm can is about as easy as it gets, and a quiet, suppressed 9mm out of a barrel this long makes a genuinely pleasant small-game and plinking setup. Up top, a Picatinny rail is ready for whatever red dot, prism, or compact scope you prefer. There are no iron sights, so plan on mounting glass, which most folks running this platform do anyway.
One Stowaway, Multiple Calibers
Here's the part that makes this platform more than a one-trick pony: caliber swaps only require a barrel and bolt face change. Dark Mountain offers conversion kits, so your 9mm Stowaway can pull double duty in 5.7×28 down the road. For hikers, preppers, cabin owners, and anyone who wants a lightweight, no-drama rifle that runs on the most common centerfire pistol cartridge in the country, the Stowaway is a smart, packable answer.
Key Specifications
- Manufacturer: Dark Mountain Arms LLC
- Model: Stowaway Rifle
- Manufacturer Part Number: SA-120
- UPC: 850061930040
- Caliber: 9mm (9x19mm)
- Action: Bolt Action, Single Shot
- Capacity: 1 Round
- Barrel Length: 16.65"
- Muzzle Thread: 1/2×28 with Thread Protector
- Overall Length (Assembled): 31.78"
- Takedown Length: 16.65" (under 17")
- Weight: 2.8 lbs
- Optics Mount: Picatinny Rail
- Safety: Single Action with Half-Cock Position
- Materials: Aluminum / Steel / Glass-Filled Nylon
- Made In: USA, Veteran Owned and Operated
What’s Included
- Dark Mountain Arms Stowaway 9mm single-shot rifle
- 16.65" threaded barrel (1/2×28) with thread protector installed
Frequently Asked Questions
Can I run a suppressor on the Dark Mountain Arms Stowaway?
Yes, and it's one of the best reasons to own one. The 16.65 inch barrel is threaded 1/2×28 and ships with a thread protector, so most common 9mm suppressors thread right on. Subsonic 9mm out of a barrel this long makes for a very quiet setup.
Does the Stowaway rifle come with sights?
No iron sights are included. Instead, you get an optics-ready Picatinny rail on top, so you can mount a red dot, prism optic, or compact scope of your choosing. Given how light the rifle is, a small micro red dot or 1x prism pairs with it really well.
Can I convert the 9mm Stowaway to another caliber?
You can. The Stowaway platform is caliber-convertible, and swapping only takes a barrel and bolt face change. Dark Mountain Arms offers conversion kits, with 5.7x28mm being the other current chambering, so one rifle can cover multiple roles.
How small does the Stowaway get for packing?
With the barrel detached, the whole package measures 16.65 inches long, under 2 inches thick, and weighs just 2.8 pounds. That footprint fits inside most standard backpacks with room to spare. Reassembly is quick, so it goes from packed to ready to fire in seconds.





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