MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System
MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System MDT MDT HS3 Chassis System

MDT HS3 Chassis System

C$499.99 Excl. tax

Allows use of AR-15 buttstocks and grips to suit your needs.

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Article number: 102148-BLK
Availability: In stock

Improve accuracy and ergonomics with our HS3 Chassis system. The HS3 is a light (2.2lb) chassis system for bolt action rifles that allows use of AR-15 buttstocks and grips to suit your needs. It is machined from 6061 aluminum, hard anodized and finished with black or FDE side panels for color, grip and feel.


NEW: Additional HS3 side panels now available in 5 different colors!

View our Instruction Manual



HS3 V shaped bedding
The action sits tightly in the V-Shaped bedding for increased accuracy.

Our HS3 (Hunter/Sniper) Chassis series is a combination of bench rest accuracy, superior ergonomics, and specialized design. The new HS3 chassis brings your bolt
action rifle to the next level in versatility and ergonomics, with an instant improvement in accuracy. The chassis itself is only 2.47lb / 1.4kg and was designed based on customer feedback who wanted longer forends (3" longer than our LSS), and use fixed rifle stocks (as compared to our LSS chassis which was designed for compact use with collapsible stocks)

The drop-in chassis serves as a base to which the operator can add tactical components according to the desired functionality. The stock is manufactured out
of aluminum, hard anodized to mil-spec type III, and has durable Polymer side panels which can be ordered in Black or Flat Dark Earth (FDE). Additional side panels are available in the colors Olive Drab Green (ODG), Hidden White (HW) and Tactical Gray (TG). You can buy more side panels here

HS3 designed for fixed stocksDesigned to accept fixed AR-15 buttstocks. Carbine stocks will also work.

This chassis was designed to accept Fixed AR-15 buttstocks and non-beavertail pistol grips. The kit does not include shoulder butt-stock and pistol grip or magazines, offering the option to customize from the wide variety available on the market.

The HS3 chassis uses AICS style magazine in .223 and .308 caliber for short action systems, and 300WM, 30.06 or .338LM for long action systems. Note that the magazine well for Long Action has the 3.715 lengths, and therefore you need AICS magazine in 3.715.

The chassis supports the installation of bolt-on MIL-STN-1913 accessory mounting rails on the bottom and sides of the forend. For the sides, you will need our specific HS3 Chassis rails. The mounting holes are spaced for Magpul style L5 (11 slots) and L3 (7 slots) rails (1.600” / 3.200”).

The rifle action only makes contact with the HS3 chassis on the V shape bedding and recoil lug area ensuring the best accuracy and repeatability. The generous clearance on the forend makes any barrel up to the size of the action itself free floated.

Recoil lug areaRoom for larger recoil lugs

Read review from The Truth About Guns HS3 Chassis Review - Initial Thoughts - Shooting with the HS3 Chassis

  • Weight: 1.4kg - 2.47lb
  • Designed for AR-15 fixed buttstocks including our Skeleton Rifle Stock.
  • Accepts any AR-15 grip, without a beavertail.
  • Fits AICS / AM Magazines in .223 and .308 (SA), .300WM and .338LM (LA)
  • Polymer sides in Black or Flat Dark Earth (FDE)

Note: Long action magazines come in 4 different lengths: 3.560,  3.715", 3.775" an 3.850". Our chassis use 3.715 magazines for all models, except Tikka T3 which uses the 3.560 magazines.


  • Remington 700 Short Action
  • Remington 700 Long Action
  • Remington Model 7
  • Tikka T3 Short Calibers
  • Tikka T3 Long Calibers (Requires MDT 3.540 Magazine)
  • Savage Models 10, 11, 12, 16 - Short Calibers
  • Savage Models 110, 111, 112, 116 - Long Calibers
  • Howa 1500 / Weatherby Vanguard - Short Calibers (Only works with MDT polymer magazines)
  • Howa 1500 / Weatherby Vanguard - Long Calibers
  • Browning X-bolt Short Action (Will not work in 300WSM)


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. The fitting may need to be modified slightly for proper feeding.
For .223 models the bolt stop may be too long. This can easily be modified.

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)
Note: Savage has many different models and configurations. In very few cases, small modifications may be necessary to the chassis to ensure trigger group and recoil lug clearance.

Savage Long Action in 338 Lapua Magnum

Savage Long Action Chassis systems all use 3.715" AICS magazine wells. The BA 110 in Lapua Magnum uses 3.850" magazines and have recently switched to a thicker recoil lug which will not fit our chassis. We will be releasing a version of the ESS in mid-2017, which will be specifically designed around the current BA 110 in 338 Lapua Magnum. 

Tikka T3 - Long Calibers
Only our Metal 3.56 magazine will fit with the chassis for this action and needs to be purchased separately.

Browning X-Bolt
Must use metal AICS magazines only. Will not work with .223 Remington or any .378" bolt face cartridge. Will not work in 300WSM


The dimensions shown are based on a Remington 700 Short Action.
Note that the Skeleton Rifle Stock shown is 1" shorter than a Magpul PRS. 

HS3 Dimensions

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