Z-RAM ZDR50 V2 Valve for the Umarex HDR50/TR50: More Shots and Tests up to 38 Joules

This article preserves the video's historical product presentation, test results, availability statements and original safety claims; it does not update those claims to the present day.

The ZDR50 V2 valve for the Umarex HDR50/TR50

Welcome to the Z-RAM YouTube channel. Daniel introduces something completely new in this video: the Z-RAM ZDR50 V2 valve. This is what it looks like. The standard HDR50 valve is shown alongside it, with the Z-Extension screwed on to provide more chamber volume. Below it is the tube that takes the 12 g capsules. That is how it is closed up here.

The problem with this part is that it only takes a 12 g capsule. With the Z-Extension fitted, the valve completely taken out here and the block removed here, there is a lot more power, but not enough shots: there might be four or six shots. That is a little too few for some people. Daniel does not necessarily mind and considers it acceptable, but the ZDR50 V2 valve has now been made for those who find that shot count too low.

This is the Z-RAM valve. The Z-Extension is mounted here as shown. This one is pretty safe, and even more so when screwed down with threadlocker: then it is safe, with no need to worry. With the ZDR50 V2 valve, the whole arrangement is even safer. The quality is superb. The second special feature is that 16 g, 20 g and even 25 g capsules can now be screwed in below.

This is what it looks like, and that is almost twice as much as a 12 g capsule. It will provide more shots with more joules. Instead of the energy dropping after the first few shots as usual, there will be many more shots at high energy. As already stated, the 25 g, 20 g and 16 g capsules all fit here, provided they have threads. Normal, unthreaded 12 g capsules no longer fit here, but Daniel does not think they will be needed either.

Why the valve has a matching ZDR50 V2 case

Unfortunately, this no longer fits the standard case. The normal case is shown here, with the part positioned as it would sit inside. Theoretically, it fits; making a little space here would allow it to go in. The capsule could not then be activated, however, because theoretically it would have to be unscrewed, pierced and screwed back together. That makes no sense at all, but Z-RAM has a solution.

Viewers already know the Z-RAM ZDR50 case, but that is for the normal valve. It hides the Z-Extension so it does not stick out at the back. This case was introduced to conceal the Z-Extension and look a little cooler. That is why Z-RAM has developed a new ZDR50 V2 case. The final product will look even better than the example shown here: the 3D printer layers will no longer be visible. The grip pulls off this way, and the capsule fits completely inside here.

This is what it looks like. The capsule is screwed in a little, and the lid can be put on. When needed, the lid is pulled off, the last turn is made and the lid is put back on. That will be shown again in a moment. Everything will first be put together properly, followed by a few tests.

The stainless steel bolt and separately available PowerPin

The Z-RAM shop now carries the stainless steel bolt and PowerPin. The shorter pin shown here is the PowerPin, which can now also be bought individually, without the valve disc usually located down here. The stainless steel pin can therefore be ordered individually, and so can the bolt; the two can then immediately be screwed together and used. There is no need to twist the old pin out of the original bolt. It is made of aluminum, which makes removal difficult: every now and then the slot breaks, leaving the pin stuck and requiring drilling.

For anyone whose attempt has gone wrong, or who does not want to try it at all, Z-RAM has the simple solution. The parts are not supplied screwed together, but that is no longer a problem: the thread fits perfectly. The pin only needs to be dropped in and the assembly screwed tight. There are four parts here in total: the ZDR50 V2 valve, bolt, pin and case. They work together. Daniel will assemble everything, and then the setup will be checked at the chronograph.

The unit is now assembled. One point had been left unmentioned: the part shown here will be delivered in black, in the same color as this example. The bolt, however, will be stainless steel rather than black. The unit works: the little pin can be seen pushing up, and this is where it comes up too. Everything works so far.

Assembly and the available case and grip colors

The case fits here. The part is inserted here, and the tuning barrel is used; it can also be bought in the Z-RAM shop. During insertion, the spring must be properly seated here, and the assembly must be able to move. All the small screws are now being replaced. Daniel positions the screws, and the video resumes shortly.

All the screws are now in, and the brass cap can also be fitted. The Z-RAM ASA-to-Chamber Adapter could of course be screwed on here instead, or even another Z-Extension, which could also make sense with 25 g capsules. For the first review, however, the setup will stay as it is. This barrel end piece will be fitted.

This is what it looks like. In principle, it looks exactly like the old ZDR50 case. The same grip colors are available: dark brown, reddish brown and black. The case is also available in silver, so the colors can be combined as desired. Daniel chooses the black grip here. It fits on here: pull it off, put it back on, pull it off, put it on.

The 25 g capsule and the repeated activation demonstration

Daniel uses these 25 g CO2 capsules, bought on Amazon; the brand name is unclear in the source. Some are always in stock, and several vendors offer them, so there will be no problems getting supplies. The capsule is screwed in here now without letting it be pierced. Just before it is pierced, when turning becomes harder, the turning stops. As shown, this is not yet under pressure.

This particular capsule is already used; it is just being used for the demonstration. The grip can now be slid on, and the setup can be left lying there. When needed, the grip is pulled off, the remaining turn is made here and the grip is put back on. Ready: that takes only three seconds. The punch button is of course a little faster. Daniel refers to a two-second difference, but whether he considers that difference significant is unclear in the source. There is now a lot more power and better performance.

Daniel now screws in this fresh capsule. It can be turned in up to this point, after which the lid is fitted and the setup can be left alone. When needed, the lid is pulled off, the remaining turn is made here and the grip is simply put back on. Then it is done; it is not a big deal. Keep in mind that there is no barrel extension in this setup. It has one Z-Extension and the 25 g capsules shown here. The next step is to see what the results look like.

The short HDR50/TR50 setup with Z50 V2 projectiles

At the chronograph, the test of course uses Z50 V2 projectiles: stainless steel, 6 g, pointed and extremely fast thanks to the stabilizing, speed-promoting grooves along the sides. These are truly high-end .50-caliber projectiles. Unfortunately, they only fit the HDR50 and, of course, the Z-RAM ZDR50. Daniel loads them normally, but from the back. The results are then checked.

The readings are 275 FPS and 21 joules; 278 FPS and 22 joules; an error; 245 FPS and 17 joules; and 248 FPS and 17 joules. The video reports six shots, although the saved subtitles do not provide all six readouts. A whole drum could certainly be fired, but, as shown, the energy was pretty consistent throughout the six shots. Performance has also increased. The best result was 278 FPS with 22 joules, using a sharp 6 g projectile—and with this short setup.

Daniel now mounts the tuning barrel again—or, more precisely, the barrel extension—and the results will be checked again. A new capsule is now fitted, and the barrel extension and barrel cover have been added. Nothing else has been changed.

With the barrel extension: a maximum of 320 FPS and 29 joules

The readings are 294 FPS and 24 joules; 320 FPS and 29 joules; 306 FPS and 26 joules; an error; 282 FPS and 22 joules; and 279 FPS and 22 joules. The maximum this time was 320 FPS with 29 joules, and this is still a short setup. A result of 320 FPS with a sharp 6 g projectile is really not bad. The test will now go one step further, adding a Z-Extension and a sniper barrel extension, before the video resumes in a moment.

The added Z-Extension and sniper barrel extension test

To recap, the new Z-RAM valve is installed with a 25 g capsule in the ZDR50 V2 case, and an additional Z-Extension has been mounted. The setup contains Z50 V2 projectiles, a sniper barrel extension and the normal barrel extension. Cool and powerful without HP: the next test checks the results.

The readings are 347 FPS and 34 joules; 366 FPS and 38 joules; 342 FPS and 33 joules; 326 FPS and 30 joules; 307 FPS and 26 joules; and 289 FPS and 23 joules. That completes the test. Another magazine could easily have been fired, and the results would probably have remained over 200 FPS. With one magazine and the 25 g capsules, six shots were achieved here. The video's summary says all six were over 300 FPS, which conflicts with the stated final reading of 289 FPS. The maximum was 366 FPS and 38 joules. Daniel considers these truly great results.

The valve's original sealing and safety claims

Today's tests are complete. As shown, the new ZDR50 V2 valve delivered great results, with more safety and better performance. As viewers know very well, the original part has a chamber that is too small; that is why the Z-Extension exists. Many viewers have reported that it opened up and burst or leaked here. That no longer happens with the Z-RAM valve because the whole part screws in with a thread. That is why nothing can happen anymore.

Nothing can leak here. There is no O-ring in here either, and none is needed at all: one turn seals it immediately. That is why the O-ring cannot break. Z-RAM also supplies the O-ring, which should be better than the standard O-ring. Several problems are therefore solved: the Z-Extension is already incorporated and 100% sealed, the thread is present here and it is 100% safe, there is a better O-ring here, and 25 g capsules can be used.

Having that inside the grip is awesome. The 20 g and 16 g capsules can also be used; the main requirement is that they have a thread. That gives a much wider range of capsules to use, and it has boosted performance. There will be an increase in power and better performance because multiple shots can be fired in succession at high power.

Strong performance in a short setup and the next tests

As already stated, the bolt and PowerPin can also be ordered from Z-RAM, as can the O-ring for the front of the chamber. The PowerPin only needs to be screwed into the new bolt, and it is ready to go. Daniel considers the result truly great. Above all, he likes the good results achieved even with the short setup, without the barrel extensions and without an additional Z-Extension. The result is a short setup that also delivers really strong performance. Daniel considers that great.

That is what Daniel continually tries to achieve with Z-RAM products: increased performance without necessarily having to use an HP system. He has nothing against HP, but still considers it very important to have small setups that can deliver strong performance.

The Z-RAM shop is linked below. Visit the shop and have a look. More videos about this new valve will follow soon; Daniel will test the other capsules to see how many shots can be fired. He hopes viewers enjoyed the video and also like the new products. Have a nice evening, leave a thumbs-up and subscribe to the channel. See you next time—Daniel from Z-RAM.

Explore the current offers: Umarex HDR50/TR50 ZDR50 CO₂ Packages: 35 J with 12g or 23 J with EX25?.

Current products — separate from the historical presentation

Z-RAM EX25-Valve Steel Valve – with Integrated Z-Extension for Tec9 Bodykit or ZDR50v2 (HDR50 / TR50) (22 Jo. 25g, 20g, 16g co2)

The current EX25 steel valve has an integrated Z-Extension and is listed for the ZDR50v2 and Tec9 body kits. The body and donor-marker parts are not included; the built-in extension does not require buying a duplicate individual extension.

View the current offer

Z-RAM ZDR50v2 Body Kit Black, (for EX25-Valve & HDR50 TR50 inerts)

The black ZDR50v2 body-kit offer contains the two-part body, drum, handle and screws. It is the body offer, not the EX25 valve or a complete Umarex HDR50/TR50.

View the current offer

Important Legal Notice

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