Description
MDT built the LSS Gen3 to be the most flexible chassis platform they make, and this Worker configuration is the grab-and-go version for right-hand Ruger American short-action rifles. It comes as a complete kit built around the Gen3 center chassis, so instead of hunting down parts you get a compact forend with polymer side panels, an AR-style pistol grip, and a folding-friendly adjustable buttstock all matched to work together. The whole thing is machined from 6061 aluminum with a durable Cerakote finish, and it uses aluminum V-block bedding to lock your action in for a repeatable, secure fit.
One of the big draws here is the switch to AICS-pattern magazine feeding. If your Ruger American runs a rotary or factory mag, dropping it into this chassis converts it over to widely available AICS-style magazines, and MDT includes an ambidextrous mag latch that drops them free with a push of the trigger finger. There's also an integrated barricade stop up front on the magwell, which comes in handy leaning off bags, fences, or truck hoods.
What Sets the LSS Gen3 Worker Apart
The real story with the Gen3 is that it's a platform, not a dead end. The center chassis stays put on your barreled action, so you can swap the forend, grip, buttstock, or buttstock interface down the road without pulling the action and losing your zero. Start with this compact Worker setup and later bolt on a full-length ARCA forend, a different stock, or M-LOK accessories as your needs change.
Getting the Worker Chassis Set Up
No bedding compound, no gunsmithing. You drop in your barreled action, run the two included action screws to spec, and you're ready to load mags. It's slim, light, and easy to carry, which makes it a natural fit for hog hunting, coyote rigs, or a compact rifle you want riding behind the seat. Whether you're new to chassis rifles or you've built a dozen, this one is about as painless as it gets to run.
Key Specifications
- Manufacturer: MDT
- Manufacturer Part Number: 115065BLK
- UPC: 990482726645
- Model: LSS Gen3 Worker Kit
- Action Fit: Ruger American Short Action, Right Hand
- Finish: Black Cerakote
- Material: 6061 Aluminum
- Magazine Compatibility: AICS pattern
- Bedding: Aluminum V-block
- Grip Compatibility: AR-15 style (no beavertail)
- Accessory Mounting: M-LOK
- Mag Latch: Ambidextrous
- Category: Rifle Chassis / Stock
What’s Included
- LSS Gen3 chassis body
- Short forend with polymer side panels
- Buttstock interface
- Adjustable buttstock (CCS)
- AR-style pistol grip
- Trigger guard
- Ambidextrous mag latch
- 2x 1/4in-28 x 1in action screws
- Setup instructions
Frequently Asked Questions
Does the LSS Gen3 Worker chassis fit my Ruger American?
This specific model is cut for a right-hand Ruger American short-action rifle. MDT makes action-specific inlets, so it's worth confirming your exact action matches before you order. If your rifle is a different action or a left-hand model, MDT offers other inlets in the Gen3 lineup.
What magazines does the LSS Gen3 chassis use?
It runs standard AICS-pattern magazines, which are widely available in a range of capacities. If your Ruger American currently uses a rotary or factory magazine, dropping it into this chassis converts it over to the AICS pattern. The included ambidextrous latch lets you drop mags free with a push from your trigger finger.
Do I need a gunsmith to install this chassis?
No gunsmithing or bedding is required. You drop your barreled action into the chassis and torque the two included action screws to spec, and the aluminum V-block bedding takes care of a secure, repeatable fit. Most folks have it done at the bench in a few minutes.
Can I upgrade the Worker kit later?
Yes, that's one of the best parts of the Gen3 design. The center chassis stays on your barreled action, so you can swap the forend, grip, buttstock, or buttstock interface without pulling the action or losing your zero. You can start with this compact Worker setup and move to a full-length ARCA forend or a different stock down the road.




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