HS3 Chassis System – MDT


Read Modular Driven Technologies (MDT) HS3 Chassis Review: Initial Thoughts

Weight: 2.0 lb

Designed for AR-15 fixed butt-stocks, including the MDT Skeleton Rifle Stock.Carbine buttstocks also work.
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)


  • Remington 700 Short Action
  • Remington 700 Long Action
  • Tikka T3 Short Calibers
  • Tikka T3 Long Calibers (Requires MDT 3.540 Magazine)
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HS3 Chassis System – MDT

The HS3 Chassis System by MDT (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 2.0 lbs and was designed based on customer feedback who wanted longer fore ends (3″ longer than the MDT LSS Chassis), and use fixed rifle stocks (as compared to the MDT 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).

This chassis was designed to accept Fixed AR-15 butt-stocks 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 system uses AICS style magazine in .223 and .308 caliber for short action systems, and .300WM, 30.06 or .338LM for long action systems, and supports installation of bolt on MIL-STN-1913 accessory mounting rails on the bottom and sides of the fore-end. Spacers are required to mount side 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 system on the V-shape bedding and recoil lug area insuring the best accuracy and repeatability. The generous clearance on the foreend makes any barrel up to the size of the action itself free floated.


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