Description
Pairing an LPVO or magnified scope with a mini red dot is one of the smartest setups going right now, and the Rebel 45 Offset from Swamp Fox is the bracket that ties it together. It positions an RMR-footprint dot at a true 45-degree angle off the bore, so when a target pops up close you just roll the rifle inboard toward your support arm and the dot is right there. No head lift, no fumbling with magnification, no second-guessing your holds. Swamp Fox did the geometry so the dot lands in line with your barrel every time.
What Makes the Rebel Offset Tick
The body is machined from ultra-skeletonized 6061 aluminum and cut to precise 1913 Picatinny spec, which means it clamps up tight with no wobble or play. It rides on a standard Picatinny base and comes in at right around 1.69 ounces, so it adds a genuine backup sighting option without weighing your rifle down. The matte black hard-anodized finish shrugs off corrosion and keeps things non-reflective, and it blends right in with standard AR furniture.
Fitting a Dot to Your Rebel 45 Mount
This mount uses the RMR footprint, so it's a direct fit for the Swamp Fox Liberty, Justice, and Kingslayer dots, the Trijicon RMR, and other RMR-pattern optics. Setup is quick: drop your dot into the plate, torque the T15 star bolts to 10 inch-pounds, and you're ready to zero. The optic screw thread pitch is M3.5 x 0.6.
Built for Both Hands
The RMR plate on the Rebel Offset is reversible, so you can flip it and run the dot on either the right or left side of the rail. That makes it a truly ambidextrous mount and a solid pick whether you shoot right-handed, left-handed, or just want the flexibility to configure your rifle your way. It's a favorite trick in 3-Gun and works just as well on a hunting or duty rifle where fast near-to-far transitions matter.
Key Specifications
- Manufacturer: Swamp Fox
- Manufacturer Part Number (MPN): RO-DSM-1913
- UPC: 889157002125
- Color / Finish: Black, Matte Hard Anodized
- Material: Ultra-Skeletonized 6061 Aluminum
- Base Type: 1913 Picatinny
- Offset Angle: 45 Degrees
- Optic Footprint: RMR
- Weight: 1.69 oz
- Base Mounting Screws: T15 Star, 10 in-lbs torque
- Optic Screw Thread Pitch: M3.5 x 0.6
- Ambidextrous: Yes, reversible plate
What’s Included
- Rebel Offset dot sight mount body
- Reversible RMR footprint plate
- Mounting hardware (base and optic screws)
Frequently Asked Questions
What red dots fit the Rebel 45 Offset mount?
The Rebel Offset uses the RMR footprint, so it's a direct fit for Swamp Fox Liberty, Justice, and Kingslayer dots, the Trijicon RMR, and other RMR-pattern optics. It does not fit RMSc-footprint dots without an adapter. If your optic follows the RMR bolt pattern, you're good to go.
Can lefties use the Rebel Offset mount?
Yes. The RMR plate is reversible, so you can flip it and run the dot on either the right or left side of the rail. That makes it a genuinely ambidextrous mount for both right- and left-handed shooters.
How do I install and torque the Rebel 45 mount?
Clamp the mount to your Picatinny rail, then drop your dot into the plate and snug the T15 star bolts to 10 inch-pounds. The optic screw thread pitch is M3.5 x 0.6. Once it's torqued and locked in, head to the range and zero your dot.
Do I still need to zero the offset dot separately?
Yes. The offset dot has its own zero independent of your primary optic, so you'll want to sight it in at a close-to-mid distance that fits how you'll use it. Swamp Fox machined the mount to a true 45-degree cant in line with the bore, which takes the guesswork out and makes zeroing straightforward.



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