ESS Chassis System

Availability: Ships in 4 - 6 weeks

Customize your ESS chassis with multiple lengths and styles of forends! The ESS provides ultimate ergonomics and features!

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Product Description


Chassis – The ESS retains our proven V-block bedding system to form a solid and reliable base for the rifle action. 
The magazine well has been refined for easy insertion of the magazine, while reducing rattle and movement.
The tab style magazine release has been replaced with a semi-flush ambidextrous paddle that can easily be activated by a weak or strong hand.

The recoil lug mortise has been designed to accommodate most aftermarket recoil lugs and the trigger area will accommodate most aftermarket triggers.

A serrated barricade stop has been added to the front of the magazine well and a polymer forend grip at the balance point adds comfort.
The wide foregrip area combined with the octagonal profiled forend tube offers flexible options when shooting over bags or improvised rests. 

Thumb shelves have been added to both sides of the chassis for shooters who prefer an open grip.

The most significant change is the incorporation of the ESS specific buttstock interface, rather than the traditional AR pattern interface.  This allows us to place the pistol grip in optimum relation to the trigger, while still allowing the shooter to choose from the wide variety of AR pattern pistol grips which suit their preference.

Butt-Stock - The MDT ESS chassis comes with its own butt-stock, similar to our Skeleton Rifle Stock.
It is fully adjustable including lateral adjustment for the butt-pad and the cheek rest.  Cheek rest height and butt-pad length-of-pull are adjustable by thumb wheels.

A buttstock with an integrated folder will be introduced soon, as well as an M4 carbine buffer tube adapter by Fall 2017.

Forend - Forends are offered in 3 different lengths, 12", 15" and 18", can be ordered with a full rail, partial rail, or no rail with cut-outs to allow low scope mounting. 

Each forend comes with M-Lok slots and QD flush cup mounts. 

Action specific scope mounting rails which co-index with the forend rail are available as an accessory.

Mounting And Compatible Accessories

The MDT ESS chassis is designed with its own buttstock for perfect ergonomics and is designed to use AR15 style pistol grips (purchased separately), and allows for customization with a wide variety of accessories. 

The Forend comes in 3 different lengths and can be ordered with a full rail, partial rail or no rail.


  • Weight: Chassis: 1.6lb, Forend: 0.6lb - 1lb, Buttstock: 2lb.
  • Length of Pull: 13.4" - 14.4" (Based on Remington 700).
  • Ambidextrous, easy reach magazine latch – can be operated with trigger finger or left hand.
  • The extra large magazine well for easy mag insertion/removal.
  • Barricade stop in front of the magazine to prevent putting pressure on the magazine.
  • Angled front profile with hand grip for minute vertical adjustments and comfort/protection from the elements.
  • Thumb rests on both sides of the chassis.
  • Wide front profile for extra comfort/stability when resting on flat surfaces.
  • Stock height at comb and heel – 0.5” below bore centerline.  1.0” of rise adjustability.
  • Allows for barrel contours up to 1.300” straight taper.
  • Accepts AICS pattern magazines for both short and long action. (3.715” long action)
  • Accepts aftermarket lugs up to 0.375 thick and tapered
  • Compatible with all non-beavertail AR pattern pistol grips.  Beavertail grips will fit with minor trimming.
  • CNC machined from Aircraft Grade Aluminum and finished with H-series Cerakote.  Cheek-piece, fore-grip, and butt-pad constructed of composites.


  • Remington 700 Short Action
  • Remington 700 Long Action
  • Savage Short Action, Models 10,11,12 and 16
  • Savage Long Action, Models 110, 111, 112 and 116
  • Savage Long Action CIP .338 Lapua Magnum - Requires MDT 3.85" Magazines
  • Tikka T3 Short Calibers
  • Tikka T3 Long Calibers - Requires MDT 3.56 Magazine
  • Howa 1500 / Weatherby Vanguard - Short Caliber - Only works with MDT Polymer Magazines
  • Howa 1500 / Weatherby Vanguard - Long Calibers

Coming Soon

  • Browning X-bolt Short Calibers
  • Browning X-bolt Long Calibers
  • Ruger American Short Action
  • Stiller Tac .338

What You Get And What You’ll Need

The ESS Chassis System comes complete with a chassis, butt stock, and a forend.
All hardware is included. You will need Allen keys to assemble and install on your rifle.

In addition to the ESS, you will need;

  • An AR-15 pattern pistol grip. Grips with a beavertail will require minor fitting.
  • An AICS pattern magazine appropriate for the rifle chambering.

Installation Manual: 

The installation manual can be found here.  


Dimensions ESS Chassis

Product Reviews

Customer Reviews 1 item(s)

Twice the quality for half the cost!
I received my ESS Chassis and fired it for the first time yesterday. I love it! It's extremely well made and very strong. I went with the 12" handguard for my 20" Remington 700 barrel. I'm using a 6 to 9" Harris bipod with medium height scope rings. After a day at the range all the hardware was still tight even without loc-tite applied yet. I just placed an order for a second ESS chassis for another Model 700 I'm building. Don't make the same mistake I made and just buy one the first time.
Review by Forrest-Fresno / (Posted on 4/15/2017)
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