MDT JAE-700 G4 Chassis Coming Soon

MDT JAE-700 G4 Chassis Hero Image

The Newly Redesigned MDT JAE-700 G4 Chassis is Coming Soon!

MDT, the new owners of the JAE Chassis brand, announced the newly redesigned JAE chassis. The “JAE-700 G4” will be available for preorder in the next couple of weeks.

From the JAE Chassis Facebook page, we learned

  • “Parts are being made for the first production run and pre-orders will be available soon. Please make sure you are signed up for the Newsletter on the website so you don’t miss the e-mail.”
  • “The NEW JAE-700 G4 Chassis will include both the Vertical Grip (shown in this photo) and the Angled Grip so you can use the one most comfortable for you or switch between the two.
  • “The vertical and angled grips for the G4 bolt on a different way so they do not fit the older models.”
  • “We will be making left-handed, just not on the first production run”
  • “The Adjustable Magwell helps you dial in the perfect fit and feed on your mags.”
  • “A lefty was made with the original JAE-700 under J. Allen also. The NEW JAE-700 G4 required new tooling and new processes with the bolt-on skins.”
  • “We will be starting with a Short Action first. Plans for LA, and not sure about Medium at this time.”
  • “We definitely have plans to make the new generation of the JAE-100 for the M1A / M14 once we get the REM 700 Chassis shipping.”

Hopefully, the JAE 700 G4 will be priced like other MDT products. Regardless after two and a half years of delay, we will finally be able to finish the 6.5 Creedmoor Long Range Sniper Rifle build.

  • Sign up for the JAE Chassis newsletter here.
  • Visit the JAE Chassis Instagram page here.
  • Visit the JAE Chassis Facebook page here.

MDT JAE-700 G4 Chassis

MDT JAE-700 G4 Rifle Chassis

JAE Remington 700 Chassis Pictures Shot Show 2022

JAE Remington 700 Chassis Pictures Shot Show 2022

JAE Remington 700 Stock Pictures Shot Show 2022

MDT JAE Remington 700 Chassis Pictures - Shot Show 2022

In July 2019, with much sadness, we learned that J.Allen had gone out of business, and one of the most winningest rifle chassis ever made, the JAE 700, would no longer be manufactured. This put a halt to our 6.5 Creedmoor Long Range Sniper Rifle Build Project. Fortunately, it seemed that while J.Allen was to be no more MDT purchased the assets and rights to the JAE 700 Remington 700 rifle chassis. It’s no secret I’m a fan of MDT, the company, and their chassis, and if there were to be a happy ending for the JAE 700 chassis, it would be under MDT.

I expected that MDT would get the JAE 700 to market somewhat quickly because the JAE 700 is darn good as is. It turns out I was wrong, my excitement turned to sadness as there was nothing but silence from Modular Driven Technologies. In fact, I became tired of waiting, and on more than one occasion, I started to look for JAE 700 alternatives from KRG (Kinetic Research Group) and Accuracy International.

Fast forward to January 28, 2022, I decided to contact MDT/JAE through the JAE dedicated website and see if I could get a status update. MDT has phenomenal customer service, and I was sure I would get a reply; I just wasn’t sure I would obtain helpful information. I was once again partially wrong. Below is their response.

Yes, we are getting closer to launching.  We had a few samples of the chassis at Shot Show last week and we are making some samples for testing.  Just making some final tweaks to the product before releasing.
Please sign up for our newsletter on our website to receive important notifications.
Thank you for your patience and have a great weekend!

JAE Customer Support

MDT JAE was also kind enough to send some JAE 700 pictures and a video from the 2022 Shot Show. See below.

It looks like our build project will be happening after all. I will be one of the first in line to order a chassis when they become available. Look for the JAE 700 to be available sometime in 2022.

JAE Remington 700 Stock Pictures Shot Show 2022
JAE Remington 700 Stock Pictures Shot Show 2022
JAE Remington 700 Stock Pictures Shot Show 2022
JAE Remington 700 Stock Pictures Shot Show 2022

MDT XRS Chassis System for Rifles

Picture of a MDT XRS Chassis System

MDT XRS Chassis System

Modular Driven Technologies is excited to announce the Crossover Rifle Stock (XRS) Chassis to their line of precision rifle chassis systems. The MDT XRS is a hybrid system bringing the benefits of a chassis to shooters who prefer a more traditional feel.

Available at Brownells,

Visit MDT

MDT XRS Chassis System

The MDT XRS Rifle Chassis is designed for shooters that want the fit and feel of a traditional shaped rifle stock with the benefits of a modern precision rifle chassis system. Each XRS Hybrid Chassis is constructed from a full-length CNC machined core of 6061 aircraft grade aluminum wearing high strength textured polymer panels for insulation from the elements. The precision aluminum V-block bedding system ensures fit and function to maximize the accuracy of any rifle action. The XRS Chassis features a replaceable over molded and textured grip system, with both an angled grip and a vertical grip included in box.

The XRS Chassis is the most advanced and configurable crossover stock on the market and is the ideal performance upgrade for any factory rifle or foundation for a custom rifle build. Weighing in at 3.9lbs (depending on inlet), the XRS is ideal for both hunting or target rifles. The XRS features adjustable length of pull via spacers from 13.25” to 15+” and a quick adjust cheek piece to adjust for scope height over bore. The XRS accepts standard AICS pattern magazines and has an easy to manipulate ambidextrous magazine latch. The generous 12” long Forend comes with M-LOK slots built in for accessory mounting and attachment of ARCA or picatinny rails.

Chassis System Compatibility

The XRS Chassis is currently manufactured for the following bolt action rifle platforms, with more to come soon.

  • Remington 700 Short Action and clones
  • Savage SA (coming May 21, 2020)
  • Howa 1500 SA / Weatherby Vanguard SA (coming May 24, 2020)
  • Tikka SA (coming May 28, 2020)

Chassis System Mounting and Compatible Accessories

The XRS chassis uses AICS style external box style magazines in .223 and .308 caliber for Short Actions.

Chassis System Specifications

  • Core is CNC machined from 6061 aluminum
  • High strength Polymer Panels
  • 12” M-LOK compatible forend
  • LOP starts at 13″ and can be adjusted with spacers
  • Adjustable cheek rest height
  • Will accommodate barrels up to 1.25″ diameter
  • Compatible with AICS pattern .223 or .308 Short Action magazines
  • Interchangeable vertical and angled grips included
  • Weight: 3.9lbs

MDT XRS Chassis System Installation Manual

Click here for the XRS Chassis System Install Manual

Modular Driven Technologies Acquires Assets of J Allen Enterprises

Modular Driven Technologies Acquires Assets of J Allen enterprises

Modular Driven Technologies Acquires Assets of J Allen Enterprises

Well to say this news pleases me is an understatement, I guess my 6.5 Creedmoor Long Range Sniper Rifle Project will happen after all!

Modular Driven Technologies (MDT), a Canadian manufacturer of chassis systems for precision shooting, has acquired the designs, tooling and patents of the precision rifle chassis system made by US-based manufacturer J Allen Enterprises. MDT will begin the transition of its chassis production in late 2019.

MDT Proudly continues the J Allen Legacy of Precision Rifle Chassis Systems

MDT Acquires JAE Chassis

MDT is excited to announce the acquisition of the designs, tooling and patents of the renowned precision rifle chassis system, the J Allen Chassis JAE-700 and JAE-100.

The J Allen Chassis systems have been touted as one of the most comfortable and configurable stock-style chassis systems in the last two decades, making it one of the most popular chassis among top precision rifle competitors. MDT is proud to continue the J Allen Legacy under the MDT line of precision rifle chassis and accessories.

CEO Maarten Van Ruitenburg states, “The acquisition of the tooling, patents, and design of the J Allen Chassis systems strengthens MDT’s position as the premier chassis manufacturer in the industry and offers another proven product to help customers SHOOT BETTER”. MDT will begin the transition of the Chassis production late 2019 at its Everson WA, USA facilities and plans to be in full production by mid 2020. “MDT will produce the J Allen Chassis with the same quality and expanded features that MDT and JAE customers expect” says Van Ruitenburg.

MDT is the leading precision rifle chassis manufacturer with offices and production in both Chilliwack BC Canada and Everson WA USA. For more information see


MDT Elite Scope Rings with Built In Anti-Cant Level

Anti-Cant devices are very important to long range precision shooters, it’s good to see scope ring and scope mount manufacturers incorporate anti-can’t bubble levels into their product offerings. Modular Driven Technologies the folks behind the MDT TAC21 Chassis System are now offering their Elite Scope Rings with Built In Level. MDT makes good stuff so I have every expectation that these rings will be well made and accurate. 

What’s an Anti-Cant Device Do? as the name implies it’s a level designed to help the shooter hold the rifle perfectly level and avoid “canting” or tilting the rifle when taking a shot.

Scope Tube Diameters

  • 30mm
  • 34mm
  • 35mm

Scope Ring Heights

  • Low .820″
  • Medium 1.000″
  • High 1.250″
  • Extra High 1.500″


MDT Elite Scope Rings offer a solid, lightweight mounting system for your optics. Made from precision-machined aluminum.


The MDT Elite Scope Rings offer a solid, lightweight mounting system for your optics. Made from precision-machined aluminum, they are available in 30mm and 34mm diameters. The two diameter options are available in four different heights (measured from top of rail to center of bore).


  • Designed for ultimate precision and strength
  • 25mm (0.984”) of lateral contact with scope tube
  • 30mm (1.181”) of lateral contact with mounting rail
  • The main body is machined on an automated seven-axis, high-end CNC machine tool
  • Extra wide profile provides extremely stable mounting
  • The bottom rail interface is machined at the same time as the scope clamp interface, guaranteeing all rings are square and parallel
  • CMM checked to 1.5 millionths of an inch precision
  • Machined from Billet 7075-T651 Aluminum – 1/3 the weight of steel with similar strength
  • Extra thick clamp system will never bend, fatigue, or become loose with use
  • Built-in bubble level on medium, high, and extra-high rings (No bubble level on low rings)
  • Stepped base-to-cap interface allows the fasteners on one side to be tightened before making final scope alignment adjustments
  • Six oversized #8-32 Grade 8 fasteners used for clamping the scope
  • Sleek curves blend well into most scopes

MDT Precision Scope Rings are designed and manufactured to STANAG 4694 specification, also known as “NATO spec”. This means the scope ring sits tight to the top of the scope base rail, with pressure being applied to the underside of the angled rail surfaces to maintain a solid interface (as shown below). This design also allows mounting on out-of-spec rails:



By contrast, US MIL-STD-1913 spec mounts attach only to the angles sides of the rail, leaving a small gap between the top of the rail and the underside of the mount, and significantly reducing the amount of contact area between the mount and rail:



Testing performed by NATO has shown that the STANAG attachment method increases the robustness of the interface, leading to increased alignment repeatability. MDT Elite Precision Scope rings can be mounted to scope base rails designed to both the STANAG and MIL-STD specifications.



MDT Adjustable Core Competition 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.

The ACC Chassis features a full Arca rail the entire length of the forend and M-LOK mounting points for accessories and additional forend weights – both internal and external – allowing you to add up to an additional 9 pounds of steel to your rifle.

This post updates our earlier MDT ACC post. View our other MDT posts


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.

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 5.9 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 – the Adjustable Core Competition chassis is nothing short of excellence for the competition shooting world.


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 MDT Vertical Grip was designed at the same time as this chassis and is 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.


  • CNC Machined from 6061 Aluminum
  • Chassis, buttstock and grip weight: 5.9lb – 13.3lb, depending on the rifle model and number of weights added to the system
  • Cerakote finish in Tactical Grey
  • 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 designed with the MDT Vertical Grip in mind
  • Wider, ergonomic 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 accommodate barrels up to 1.350″ diameter
  • Compatible with AICS style magazines


The ACC chassis system comes as an assembled chassis, buttstock, with all required mounting hardware included. This includes new action screws, thumb screws for tooless buttstock adjustment as well as set screws for optional, more permanent buttstock setups.

To complete this chassis on your rifle, the additional items you need to purchase are: