MDT ACC Chassis System

The ACC (Adjustable Core Competition) Chassis is designed around an integrated, modular weight system which allows you to customize the balance and mass of your rifle to maximize performance and minimize recoil.

The ACC comes with a Skeleton Rifle Stock with a steel butt pad plate, for added weight, and a dedicated space to add even more weight to the stock if required. Adjustable Core Competition chassis system is designed for the competition world: the ACC is primarily suited for the PRS & NRL shooting style, although it can be used in other disciplines. The ACC chassis system is the result of endless testing and collaborating with competition shooters, implementing the most crucial and results driven features, while ensuring accuracy and precision remain unparalleled.

Please note: Some action inlets, left handed models & colours will be special order and have extended delivery times.

Write the first review

available Available (allow 3 weeks for delivery)

Available to order

Choose option:
from £1,034.99 inc VAT
£862.49 ex VAT



You may also need:
MDT ACC Internal Forend Weights 2.6 Ibs (5 Pack)
MDT ACC Internal Forend Weights 2.6 Ibs (5 Pack)
£134.99 inc VAT
£112.49 ex VAT
MDT ACC Mirage Shield
MDT ACC Mirage Shield
from £138.99 inc VAT
£115.83 ex VAT
MDT M-LOK Rear Aluminium Bag Rider - .21 Ibs
MDT M-LOK Rear Aluminium Bag Rider - .21 Ibs
£45.99 inc VAT
£38.33 ex VAT
MDT M-LOK Rear Steel Bag Rider - .44 Ibs
MDT M-LOK Rear Steel Bag Rider - .44 Ibs
£72.99 inc VAT
£60.83 ex VAT
MDT Buttstock Weight - .65 Ibs
MDT Buttstock Weight - .65 Ibs
£54.99 inc VAT
£45.83 ex VAT
MDT Vertical Premier Pistol Grip
MDT Vertical Premier Pistol Grip
£47.99 inc VAT
£39.99 ex VAT
MDT Elite Muzzle Brake
MDT Elite Muzzle Brake
£112.99 inc VAT
£94.16 ex VAT
MDT Polymer AICS .223 Magazine
MDT Polymer AICS .223 Magazine
from £36.99 inc VAT
£30.83 ex VAT
MDT Metal AICS .308 10 Rnd Magazine
MDT Metal AICS .308 10 Rnd Magazine
£64.99 inc VAT
£54.16 ex VAT

Product Description

The ACC (keyword A for Adjustable) was created with an integrated weight management system, allowing shooters to fine tune their chassis’ weight and balance point. The adjustability comes from a series of weights that can be added to either the buttstock, interior forend or exterior forend m-lok. It’s original weight of 4.5 lbs transforms into a maximum of 12.3 lbs (chassis only - add on your action, barrel, scope and accessories and most shooters are pushing 25-30 lbs in the ACC).

All of this modularity and adjustment can be achieved without taking your barreled action out of the chassis system: internal forend weights can be inserted from the front of the forend and screwed in place, while external weights were designed to be M-LOK compatible and easily attached on either side of the forend. This ACC weight management system allows shooters to rapidly adjust the feel and recoil characteristics of their system, even while at the range.

Along with other features like the full 17” ARCA/RRS forend, flared magazine well, extended barricade stop, widened thumb shelf, adjustable cheek riser and length of pull, and the adjustable MDT Vertical Grip Elite - the Adjustable Core Competition chassis is nothing short of excellence for the competition shooting world.


  • CNC Machined from 6061 Aluminum
  • Chassis, buttstock and grip weight: 4.5lb - 13.5lb, depending on the rifle model and number of weights added to the system
  • Cerakote finish
  • 17" of available ARCA/RRS dovetail, with retention screw so that accessories don't fall off mid-stage
  • M-LOK pattern attachment system on all 3 faces of the forend
  • Accepts most AR-15 pistol grips, but includes with the MDT Vertical Grip Elite
  • Wider, ergonimic thumb shelves than previous chassis systems
  • Mag latch limiter to prevent over camming and pinching of magazines
  • Uses our proprietary ESS buttstock interface
  • Free floating barrel channel with removable end cap for interior weight installation and adjustment
  • Trigger adjustment slot of R700 single stage triggers
  • Will accomodate barrels up to 1.350" diameter
  • Compatible with AICS style magazines


The ACC chassis is designed to accept an ESS compatible buttstock, with a few modifications to provide extra weight and solid lockup of adjustments, whilst still being tooless. The ACC Chassis System now includes The MDT Vertical Grip Elite, built for the competitive shooter.

The ACC chassis accepts AICS-pattern external box magazines, and supports installation of M-Lok patterned accessories along the forend. The full length Arca/RRS standard dovetail allows shooters to mount a wide variety of accessories with infinite adjustment, which is now a standard among the competitive community.


A delivery cost will be added to your order at checkout and is relevant for standard delivery to England, (parts of) Scotland and Wales (excluding Channel Islands) at £6.95 for 2-3 day delivery. 

PLEASE NOTE: All items deemded as a 'Firearms' or over the standard delivery weight limit (Gun Safes) may have extra charges for delivery. You must enter an RFD (registered firearms dealer) address at the checkout for all firearms orders that are not being collected in store.

Delivery costs to the Highlands and Islands are detailed at the checkout.

Please see full information here


As detailed in our Terms and Conditions you may cancel your order at any time up to the end of the seventh (7th) day from the date you received the goods. Unless the Goods are faulty (verified by us) or obviously not the goods originally ordered we reserve the right to reclaim all costs incurred by us in recovering them from you and may set such costs off against the amount to be re-credited to your debit or credit card. See more info here

Note: Currently not available for delivery to Ireland, Europe, North America, Australia and New Zealand and R.O.W..

Product Features

  • Orientation: Left Handed, Right Handed


Please allow Cookies to view video content

Collect in Store

This item is available for collection.

Home Delivery

UK mainland delivery from £6.95

check delivery cost

Loyalty Scheme

Earn up to 1034 loyalty points with this product.

You Can Also...

Get help or write a review...

ask a questionwrite a review

You may also like...

People who bought this also bought...

Hawke Airmax 2-7x32 AOHawke Airmax 2-7x32 AO
Hawke Airmax 2-7x32 AO
£124.99 inc VAT
£104.16 ex VAT
MDT ESS Chassis SystemMDT ESS Chassis System
MDT ESS Chassis System
from £939.99 inc VAT
£783.33 ex VAT

Big Gun’Pick’n’MixBig Gun’Pick’n’Mix
Big Gun’Pick’n’Mix
from £55.00 inc VAT
£45.83 ex VAT

Britannia Picatinny Rail - Anschutz
Britannia Picatinny Rail - Anschutz
from £64.99 inc VAT
£54.16 ex VAT

Vortex Diamondback 3.5-10x50Vortex Diamondback 3.5-10x50
Vortex Diamondback 3.5-10x50
£229.00 inc VAT
£190.83 ex VAT
Air Arms Pro Sport Beech
Air Arms Pro Sport Beech
£758.99 inc VAT
£632.49 ex VAT