As soon as the announcement was made about the MDRx, I immediately started to receive emails and calls about what technical information I had on it. To make it simplier and to get this information out there, I decided to type up what I know.
In order to make sure that the aftermarket products that I make will continue to be compatible with the new system, I took a trip to Desert Tech and met with the engineer heading the MDRx project. I’m happy with the changes and looking forward to being to add a few new options to our own product line because of them.
There are now 2 versions of the chassis, Forward Eject and Side Eject. (also a compliant version that I wont go into)
The Forward Eject uses the same ejection system that the
original MDR used. The changes made to the MDRx are
- an improved polymer that is more impact
resistant.
- the trigger has had some geometry changes to the
sears and transfer bar that has reduced the amount of creep as well as has
lowered the pull weight. Also, when placed on safe, the trigger now has no
movement.
- the gas block has had a through hole added to
where the piston goes in order to aid in removing water or mud from the gas
block in the case of submersion.
- the barrels are forward and backward compatible with
the original MDR
- the addition of the 6.5 Creedmoor as well as 20
inch barrels and a compliant package.
The side eject has some substantially different changes from
the original MDR
- the polymer, trigger and gas block changes are
the same as the Forward Eject MDRx.
- gas plugs have been changed to accound for the reduced pressure needed to operate the system.
- the scissor panel and ejection chute have been
replaced with a smooth panel that has a seal around it to prevent gas leakage
and a window panel with a brass deflector like that of an AR-15.
- the bolt has been changed to an AR-15 styled
bolt head with a plunger ejector
- a removable and reversable side panel has been
added to the bolt carrier to seal the ejection port when the bolt is forward.
The bolt carrier has a design change to allow for this, so it will not be
compatible with the original MDR bolts.
- the barrel extension has been changed to allow
for a reversable side extractor. This makes Side Eject barrels specific to the Side
Eject bolt. The original MDR barrels and Forward Eject MDRx barrels will not
work.
- currently this is only available in .223 and
300BLK. Including the 20 inch barrels and compliant packages.
- to convert from Forward Eject to Side Eject will
require a barrel assembly, bolt and carrier assembly, and the Side Eject panel
and window.
I believe these changes both in price and with the updates are a great thing for this system. With the expected shipping being the end of SHOT Show, we will be taking orders through our online store. We also will continue to support this system with aftermarket barrels for the Forward Eject system as well as we will be working to get Side Eject barrels developed as quick as we can.
Orders can be placed through the links below.
Side Eject
https://www.es-tactical.com/store1/MDRx-Side-Eject-Factory-p168878153
Forward Eject
https://www.es-tactical.com/store1/MDRx-Forward-Eject-Factory-p168876076
All our cut rifling prefit barrels and our MDR barrels and conversions will be 10% off this month.
Use the code "10off" during checkout.
Products on sale are (Click for link):
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