Description
MDT built the STS (Skeleton Traditional Stock) for folks who love the modularity of a chassis but still want their rifle to feel like a rifle. It bolts to the rear of the LSS Gen3 and brings back that classic semi-pistol grip and buttstock profile, so if you grew up shooting traditional stocks and never quite warmed up to a full skeleton chassis look, this is the piece that bridges the gap. You get the comfort and control of a conventional stock paired with the consistency MDT chassis systems are known for.
Where the STS Buttstock Earns Its Keep
Slippery stocks cost you shots, plain and simple. The STS uses an overmolded rubber grip with a hybrid grip angle and thought-out surface geometry that gives your hand something real to hang onto whether you're dealing with rain, sweat, mud, or dust. That secure hold, combined with an integrated thumb shelf, keeps your form repeatable from one string to the next, which is exactly what you want when you're trying to shrink groups or stay steady off a barricade.
Dialing In Your STS Fit
Everyone builds a little different, and the STS is set up for that. It ships with LOP spacers so you can tune length of pull to your frame and your gear, and the adjustable foam cheek piece is compatible with MDT thumbwheels for tool-less cheek riser adjustment when you want to get your eye behind glass fast. M-LOK and QD sling mounts come along too, giving you clean options for slings and accessories without cluttering up the stock.
Matching the STS Buttstock to Your Build
One thing worth knowing up front: this stock is designed specifically for the LSS Gen3 Chassis and won't fit older MDT platforms. If you're already running a Gen3 or putting one together, the STS drops right in and lets you swap the back end of your rifle to suit precision, speed, or plain old comfort. It's finished in black with the black rubber overmold, and MDT includes the hardware you need to get it mounted.
Key Specifications
- Manufacturer: MDT
- Manufacturer Part Number: 114453BLK
- UPC: 990482710545
- Model: STS Buttstock (Skeleton Traditional Stock)
- Compatibility: MDT LSS Gen3 Chassis System
- Color: Black
- Grip: Overmolded rubber with hybrid grip angle
- Cheek Riser: Adjustable foam cheek piece, thumbwheel compatible for tool-less adjustment
- Length of Pull: Adjustable via included LOP spacers
- Sling Mounts: M-LOK and QD
- Extras: Integrated thumb shelf
What’s Included
- MDT STS Buttstock (black, rubber overmold)
- LOP spacers
- M-LOK sling mount
- QD sling mount
- Installation hardware
Frequently Asked Questions
What chassis does the MDT STS Buttstock fit?
The STS is designed exclusively for the MDT LSS Gen3 Chassis System and connects to the rear buttstock interface of that platform. It won't fit older LSS chassis or other MDT systems. If you're building or already running a Gen3, it drops right in.
Can I adjust length of pull and cheek height on the STS?
Yes. Length of pull is tuned with the included LOP spacers so you can match the stock to your frame and gear. The adjustable foam cheek piece works with MDT thumbwheels for tool-less cheek riser adjustment, letting you get behind your optic without digging out tools at the range.
How is the STS different from MDT's SCS buttstock?
The STS keeps a more traditional rifle profile with a semi-pistol grip and classic stock feel, while the SCS leans into a modern skeleton chassis look with fully tool-less adjustments. Both give you repeatability, but the STS is aimed at shooters who prefer that familiar conventional stock ergonomic. It's a great pick if a full chassis feel never quite suited you.
Does the STS Buttstock come with everything needed to install it?
It ships with the LOP spacers, M-LOK and QD sling mounts, and the installation hardware to mount it to your LSS Gen3. Because the Gen3 lets you swap the back end without pulling the barreled action, you can add the STS without losing your rifle's zero.




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