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Silverback MDR-X

7987 Views 136 Replies 10 Participants Last post by  Leo Greer, 
Doctor Jest
Intriguing. Probably over-engineered. I'm pondering how solid it could be as a long-range platform...with an Edgi barrel and Warhead motor.


-CNC aluminium wide bore cylinder/upper gearbox (26mm diameter, +19% compared to a standard AEG), including a spring quick change design.
-CNC aluminium cylinder head, NBR piston damper, stainless steel nozzle.
-CNC aluminium ventilated piston head, FKM o-ring, POM glider ring.
-CNC stainless steel & aluminium spring guide, equipped with a thrust bearing. 3 lugs design ensuring a better axial alignment.
- “Tappet plate-less” construction.
-CNC aluminium piston body, hardened MIM steel 16 teeth rack.
-18:1 torque up gear set, hardened MIM steel.
-ADC 12 aluminium gearbox carter, 10mm ball bearing.
-Designed to operate on 11.1V Li-Po batteries (possibility to operate on 7.4V).
-Electronic Trigger Unit, CPU motor control, gear cycle and fire selector position detection by Hall Effect sensor. 2 mosfets for power, 1 mosfet for active braking.
-Neodymium high-torque motor 19000RPM (11.1V), short axis.
-Silver-plated wiring, Teflon coated.

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Doctor Jest
GBB is a waste of time IMO - and yes, I have both owned and used several including a WE SVD and SCAR-H. The performance is just not good enough, or consistent enough, or reliable enough for my needs....yep, it's a totally subjective opinion and I understand why GBB/EBB has adherents (The SVD in particularly kicked like a 5.56mm and was a great, visceral experience) but these days I want absolute precision and reliability. That raises the question of HPA but I can't stand that either.........again, I've tried it.

Then again, the MDR-X could suck - look at the AAF when they tried to cram a whole load of refinements/improvements into an AEG platform....:)
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Doctor Jest
Those two were just examples, I've owned more. The SVD is a finicky beast but it can be great when upgraded and stable........but generally the reason to own a GBB seems to be immersion with a touch of realism. The G3A3 (I am an H&K nut) has tempted me on several occasions but as we do get below freezing here, then I just want to pick up a replica and have it run as reliably as an AEG. Performance aside - and let's be honest, the main difference is kick rather than ROF, or FPS, or indeed, accuracy - I've had my fill of GBBs and am moving back to spring/electric and nothing else........

WITH that said....if I found a GBB that did what I required without HPA then I would about turn and buy one :)
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Doctor Jest
As an aside, I got the mags for my SVD for £10 in a sale at a wholesaler where a friend had a trade account - and they were amazingly well built. In fact, the gun overall was a tank, I just couldn't iron out all the flaws to my satisfaction and keep the FPS at a reasonable level. It was, by far, the most fun I had shooting an airsoft replica.


I'm still waiting to see a price on the MDR-X but I'm willing to bet it's in the high hundreds with that level of manufacture and design.
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Doctor Jest
Maybe 😁 maybe not. I will withhold any assumptions and wait to see how they perform. Totally agree about the price but if it’s good enough I would consider it.

Possibly.
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Doctor Jest
Update. More features that are potentially amazing but I have no information as to their implementation.


Included in the box:
• 78 rounds AR10/SR25 type magazine (G&P / A&K Type)
• Two additional power spring (AEG & DMR Power limits)
• One semi auto only replacement trigger board (semi/ full auto trigger board installed out of the box).
• A pin puncher for easy battery change and disassembly
• 4 keys (Allen 2.5mm, Allen 5mm, Torx T20 and Torx T25).
• One high nub for the hop up unit, to lift bbs from 0.32 grams and above (low nub installed out of the box).
• One PCB jumper, used to switch from 11.1V to 7.4V batteries or deactivate battery protection.
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Doctor Jest
Further update: According to Longbow BB in the UK (Main stockists) changing the boards around is a matter of 6 screws. So....you can allegedly/potentially change from a field AEG to a DMR within a couple of minutes. Given the close proximity of UK limits for AEG to DMR I would, in all probability, stick to one tried and tested nub/rubber combination then simply vary the power.

I'm excited.
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Doctor Jest
Pre-order update:

£560 which is way less than I was expecting.

This way for MDR-X goodness.
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Doctor Jest
Full specs. I'd probably change the barrel/rubber/nub but everything else (assuming it works as advertised!) looks great.


Realistic construction and assembly
  • Made under exclusive license from Desert Tech LLC
  • Fully engraved markings with unique serial number.
  • 6000 series aluminium receiver/outer barrel and muzzle brake.
  • PA6 Nylon, fiberglass reinforced stock, grip and handguard, synthetic rubber buttpad.
  • MLOK handguard, with 3 slots at 3, 6 and 9 o’clock.
  • 2 steel QD attachments at the rear of the stock.
  • Ambidextrous fire selector and 3 points magazine release.
  • Swappable realistic ejection panels.
  • Realistic motion ambidextrous cocking lever.

High quality Gearbox
  • Designed to operate on 11.1V Li-Po batteries (possibility to run on 7.4V)
  • Electronic trigger, CPU motor control, gear cycle and fire selector position detection by Hall Effect sensor.
  • CNC aluminium wide bore cylinder (26mm diameter, +19% wider than standard AEG), including a spring quick change design.
  • Useful volume 22.5 cc ( with stock ventilated 75% cylinder)
  • CNC aluminium cylinder head, NBR piston damper, stainless steel nozzle.
  • CNC aluminium ventilated piston head, FKM o-ring, POM glider ring.
  • CNC stainless steel & aluminium spring guide, equipped with a thrust bearing. 3 lugs design ensuring a better axial alignment.
  • “Tappet plate-less” construction.
  • CNC aluminium piston body, hardened MIM steel 16 teeth rack.
  • 18:1 torque up gear set, hardened MIM steel.
  • ADC 12 aluminium gearbox carter, 10mm ball bearing.
  • Neodymium high-torque motor 19000RPM (11.1V), short axis.

Efficient hop-up design
  • Hop-up unit made of durable Polycarbonate material.
  • TCD, rotary ring design.
  • Incremental “click” adjustments using 2 ball plungers, 36 positions ranging from 0 up to 750 µm with the low nub (installed, for standard bbs configuration), and from 500 up to 1250 µm with the high nub (provided, for heavy bbs configuration).
  • 420 mm brass inner barrel. 6.05 mm bore, chemical passivation surface treatment, AEG hop-up cut.

The MDRX is coming with:
  • 78 rounds AR10/SR25 type magazine (G&P / A&K Type)
  • Two additional power spring (*).
  • One semi auto only replacement trigger board (semi/ full auto trigger board installed out of the box) (**).
  • A pin puncher for easy battery change and disassembly
  • 4 keys (Allen 2.5mm, Allen 5mm, Torx T20 and Torx T25).
  • One high nub for the hop up unit, to lift bbs from 0.32 grams and above (low nub installed out of the box).
  • One PCB jumper, used to switch from 11.1V to 7.4V batteries or deactivate battery protection (***)
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Doctor Jest
There are RC batteries that would fit, I don't have a link to hand right now but yeah, I hate using PEQs so I shall get looking!
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Doctor Jest
Regarding batteries and trigger response - you can absolutely make a snappy DMR but until a good tech (not me!) gets hands-on with the MDR-X I don't know what stock performance is like. At the least, you could throw in a brushless motor and short-stroke appropriately but I'm 100% going to get one in what will be the second batch - AFTER tests appear :)
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Doctor Jest
as far as I’m aware, the increase in trigger response is next to nothing
Click to expand...

The difference can be night and day, depending on the stock gears and piston. My "Cheap" Galaxy MP5k (TM Clone) is short-stroked with a different motor and it's a monster. In the MDR-X I'm thinking of a Warhead 35k base......not for reliability issues, but just to allow me to reduce the trigger pull and increase the response time when in DMR mode.
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Doctor Jest
Some. Quite a bit as an end user.......I use Negative Airsoft as my Tech and he short strokes nearly everything to some extent as most stock guns seem to beeasily improved that way. What I can't work out is how many teeth to take off the release or sector gear, and when that amount of teeth becomes relevant as he varies the amounts depending on gun, task and requirements. I guess that's why he does it full-time!

I think my MP5k was two teeth off the piston, one off-the-sector gear, a slightly larger spring, and a high-torque motor so essentially it cost me the same as a stock Marui. I only wanted a backup so it runs at 300fps on .2 but has a very sensitive trigger, and should I have to employ it, quite a blistering rate of fire.
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Doctor Jest
He's atypical I guess 😃 he doesn't worry about aoe and often does unequal SS in that different amounts are removed.....and as far as I know doesn't worry about piston weight.

Caveat is that whilst he can build stupidity high rof replicas he doesn't like to build wanker guns, his term not mine! I'm sure he's cognizant of such things but generally speaking we don't see many extreme builds and while his work still offers performance and longevity, as well as providing for his family, all is well.

I get the theory, good clarification tho!
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Doctor Jest
Completely offtopic...

If someone is building a high ROF out of technical interest, or as a test of their ability I don't have a problem at all. If however, someone is bringing a high ROF to the field, they are, inevitably, going to use it on full auto....and that's pointless....not to mention potentially dangerous. Thank GOD there are CQB fields that stipulate semi-only and the like.....anyway.... There used to be a marginal excuse in that before MOSFETs were common, the best way to get a fast trigger response was the usual panoply of high-speed motor, gears, large battery, and all the other bells and whistles we would expect. These days, that excuse is utterly redundant.

Yes, I had a wanker gun. Short-stroked G3SAS that could dump a standard mag in 2 seconds. The hilarious part is that I only used it on semi and 12 years later, the chap I sold it to was still using it without changing a thing other than the spring :cool:
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Doctor Jest
Free/Discounted guns are in the same category as (something else I know about) discounted guitars. No company will give you a price break of whatever sort unless they're going to receive a lot of publicity and advertising as a consequence......and yes, that means sometimes people you know to be utter arseholes get free/discounted gear. Don't get me wrong, it IS possible; I received a couple of pieces of low-end gear when I ran a reviews website for guitar, and I've also had some free ghillie suits when I moderated the Sniper boards on the two biggest UK forums (UKAN and ASCUK). However, in a more contemporary world, you need to be high profile, with a lot of social media presence, probably a YouTube channel with a load of subs...........as much as AirsoftMike does appallingly bad reviews and doesn't ever utter a negative comment about the guns he features, he does get a lot of replicas early......one would assume some are returned but equally some aren't.

As to how quiet....not sure!
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Doctor Jest
Absolutely worth a shot! Airsoft is something of a cottage industry so perhaps they look on less celebrated users with an eye to the value of their input rather than exposure- I know I do 👍
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Doctor Jest
I think I have dropped everything i can into my VSR but if I hadn’t installed a Tridos i would be tempted by the TTI. It’s simply got everything you need in one place! Not seen any pictures of the mdr-x hop but it seems to have everything you need- on paper at least.
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Doctor Jest
No subtitles, but a very brief shooting segment.

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Doctor Jest
Judging any audio clip from YouTube (with its well-known compression algorithms) makes very little sense overall - except for subjective taste. I'm waiting for the forthcoming video from Longbow BB.
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