MDT LSS Chassis - Complete Kit + Free Gift

Brand: MDT Modular Driven TechnologiesMDT Modular Driven Technologies

SKU: MDT-LSS-COMPLETE-KIT_12822_12853_12873

SALE PRICE: $399.99 each
MDT Buttstock
Picatinny Rails
MDT Fixed Stock Adapter for LSS - V2
Folding Stock Adapter
PRS Long Range Precision Shooting 3 Bag Set - WAS $125

Have questions about your build? Phone: 250-715-7290 Toll Free: 844-562-8221
We ship out FREE little gifts with each order.

Did you know we offer Military Discounts as part of our Honor Program?
Find out more www.LockhartTactical.com/HONOR

Please note, the LSS is the nearly identical to the LSS-XL chassis, except for two features:
1) The LSS-XL has a built in fixed buttstock adapter, where as the LSS chassis requires the additional purchase of the Fixed Stock Adapter for LSS - V2
2) The LSS-XL has a 3" longer foreend, allowing a bipod to be positioned further away from you, enhancing stability.


  • Anshutz Model 1771
  • Remington 700 Short Action
  • Remington 700 Long Action
  • Remington Model 7
  • Remington Model 783
  • Remington R700 Clones such as Bergara B14
  • Savage Short Action, Models 10, 11, 12 and 16
  • Savage Long Action, Models 110, 111, 112 and 116
  • Savage Axis - Short Calibers
  • Tikka T3 / T3x - Short Calibers
  • Tikka T3 / T3x - Long Calibers. Requires MDT 3.56 Magazine.
  • Mossberg MVP 5.56 (.223) using AR-15 Magazines
  • Mossberg MVP 7.62 (.308) using AR-10 Magazines
  • Mossberg Patriot Short Action
  • Howa 1500 / Weatherby Vanguard - Short Calibers. (Only compatible with MDT Polymer magazines)
  • Howa 1500 / Weatherby Vanguard - Long Calibers.
  • Howa 1500 Mini Action -Short Calibers. (Only compatible with the OEM Magazines)
  • Ruger M77 (Scout) Short Action
  • Ruger American - Short Action

Please note important action specific information at the bottom of this page.


Our LSS chassis system was designed to be as compact as possible. The V-shaped bedding and free floated fore end improve accuracy and ergonomics. The fore-end allows for barrel contours up to 1" in diameter.

The chassis system is manufactured out of billet 6061-T6 aluminum, which has been hard anodized to mil spec type III for extra strength, and has been finished with Cerakote™ in Black or Flat Dark Earth (FDE).

To keep this chassis system compact, it was designed for collapsible AR-15 buttstocks, however fixed buttstocks can mounted with the use of a fixed stock adapter.


The LSS chassis is designed to accept any AR-15 butt-stock and pistol grip (purchased separately), offering the option to customize from the wide variety of  Accessories available on the market.

The LSS chassis uses external box style magazines in .223 and .308 caliber for Short Action and .300WM or .338LM magazines for Long Action rifles, and supports installation of bolt on MIL-STN-1913 accessory mounting rails. Mounting holes are spaced for Magpul style L5 (11 slots) and L3 (7 slots) rails (1.600” / 3.200”) to be used on the bottom of the fore end up to 6.5" in length.

Note: Long action magazines come in 3 different lengths: 3.715", 3.775" an 8.050". Our chassis use 3.715 length magazines.


  • Increases accuracy by up to 21%

  • Construction aluminum hard anodized to mil spec type III

  • Cerakote Finish in Black or Flat Dark Earth

  • Hole spacing for Magpul L5(11slot) and L3(7slot)Rails

  • Designed for Collapsible AR-15 buttstocks

  • Accepts most AR-15 Pistol Grips

  • Lightweight, free-floating modular fore-end

  • Will accommodate barrels up to 1" diameter.

  • Compatible with AICS style magazines in .223 or .308 (SA) and 300WM, 30.06, 338LM (LA). (Long Action Magazine length 3.715)

  • Weight: 1.6lb - 1.8lb

For rifles with longer barrels to be used for long range (past 900 meters) we recommend our TAC21 or our HS3 Chassis systems.


The LSS chassis system comes as a 1-piece chassis, with all required mounting hardware included. This includes new action screws, and a screw for the pistol grip.

To complete this chassis on your rifle, the additional items you need to purchase are:

  • Any AR-15 buttstock. For fixed buttstocks you will need the fixed stock adapter, or consider using our LSS-XL chassis.

  • A buffer tube for your buttstock. (Both milspec and commercial work on our chassis)

  • An AR-15 Pistol Grip. Ideally without a beavertail, or use a soft (bendable) beavertail.

  • At least one magazine

If you prefer a longer fore-end, please also see our LSS-XL chassis System or our HS3 Chassis System.


1) Howa 1500 / Weatherby Vanguard actions

This is the only action that we manufacture a chassis for, that has a flat bottom action. For this reason only our Polymer magazines will work. It will be a tight fit, and the magazine may need to be modified slightly for a good fit and proper feeding. For .223 models the bolt stop may be too long. This can easily be modified.

2) Savage models 10/110 11/111 12/112 16/116

For rifles with the bolt release at the bottom, the bolt release can be engaged through the side of the chassis, using a pin or tool. (Not included)

4) Tikka T3 - Long Calibers

Only our Metal 3.56 magazine will fit with the chassis for this action and needs to be purchased separately.

5) Savage Axis

The original recoil lug that comes with the rifle is required for installation into the chassis.

Brand URL : https://www.lockharttactical.com/mdt