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The MDT LSS Gen3 Chassis Base is the starting point for building your Ruger American Short Action into whatever you need it to be. This is the right-hand, black Cerakote version, and it forms the central core that your barreled action mates into. From there, you add your own forend, buttstock interface, buttstock, and grip to tailor the rifle for hunting, competition, tactical work, or just plinking at the range. No gunsmithing, no drama. Drop in the action, secure it, and you're set.
The big draw with the Gen3 platform is modularity that doesn't cost you your zero. Because the barreled action stays put in the center chassis, you can swap forends and buttstock adapters without pulling the action. That means you can run a lightweight hunting forend one weekend and bolt on a heavier competition setup the next, all while keeping the rifle tuned and zeroed. MDT lists over a million possible build combinations across the system, so this base really is a blank canvas.
This base is CNC machined from 6061 aluminum and finished in black Cerakote, striking a solid balance between rigidity and manageable weight. It uses V-block aluminum bedding, feeds from AICS-style magazines, and ships with MDT's Ambi Mag Latch, with the option to run the Adjustable Mag Latch down the road. It accepts most AR-15 pattern pistol grips and works with a 1.25 inch straight diameter barrel contour. Keep in mind this Ruger-specific inlet uses dedicated buttstock interface assemblies, so those aren't interchangeable with standard LSS Gen3 interfaces.
The beauty of starting with the base is that your rifle can evolve as your needs change. Pick up a forend when you want M-LOK real estate for a bipod and accessories, add a buttstock interface for your preferred stock or brace, and swap grips whenever the mood strikes. One chassis, plenty of directions to take it.
No. The base is the center core that mates to your barreled action, and it's designed so you choose your own forend, buttstock interface, buttstock, and grip separately. That's the whole point of the modular design, it lets you build the rifle to fit your exact use. You'll want to grab those components to complete the setup.
This specific base is inletted for the Ruger American Short Action in a right-hand configuration. Make sure your action matches that description before ordering, since inlets are action-specific and not cross-compatible. If you're running a left-hand or long action, you'll need a different base.
Yes, and it's one of the standout features of the Gen3 system. Because the barreled action stays seated in the center chassis, you can change forends and buttstock adapters without removing the action, so your optic holds its zero. That makes going from a hunting build to a heavier competition setup quick and painless.
It feeds from AICS-style magazines, which are widely available and a common standard in the precision rifle world. The base ships with MDT's Ambi Mag Latch, and you can upgrade to the Adjustable Mag Latch if you want to fine-tune magazine fit. That gives you flexibility across different mag brands.
| UPC | 990482710682 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 114603BLK |
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