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The MDT ESS chassis incorporates proven V-block bedding to create a solid base for the rifle action. The magazine well has been improved for easy insertion of the magazine, while preventing rattling and movement. The tab style magazine release has been replaced with a semi-flush ambidextrous paddle that can easily be activated by either hand. The recoil lug mortise has been designed to accommodate most aftermarket recoil lugs, and the trigger area can handle 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 fore-grip 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 chassis specific buttstock interface, rather than the traditional AR pattern interface. This allowed MDT to place the pistol grip in optimal relation to the trigger, while still allowing the shooter to choose from a wide variety of AR pattern pistol grips that suit their preference.

The MDT ESS chassis comes with its own buttstock, similar to MDT's 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.

The weight of the chassis system, including the forend and buttstock, ranges from 4.4 to 4.8lbs depending on the action. The length of pull is between 13.4" and 14.4" based on the Remington 700. The ESS chassis has an ambidextrous magazine latch that can be operated with a trigger finger or left hand. The extra-large magazine well allows for easy mag insertion and removal, and a barricade stop has been added in front of the magazine to prevent putting pressure on it. The angled front profile with a hand grip provides minute vertical adjustments, comfort, and protection from the elements. There are also thumb rests on both sides of the chassis.

The wide front profile offers extra comfort and stability when resting on flat surfaces. The stock height at comb and heel is 0.5" below bore centerline, with 1.0" of riser adjustability. The ESS chassis allows for barrel contours up to 1.300" straight taper, although note that at larger barrel diameters, there is less space in the forend to accommodate internal attachments such as QD cups, M-lok, and sling swivels. It accepts AICS pattern magazines for both short and long action, with a long action length of 3.715". The ESS chassis also accepts aftermarket lugs up to 0.375" thick and tapered, and it is compatible with all non-beavertail AR pattern pistol grips. Beavertail grips will fit with minor trimming.

The MDT ESS chassis is CNC machined from aircraft-grade aluminum and finished with H-series Cerakote, while the cheek-piece, fore-grip, and butt-pad are constructed of composites.