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Cobra R-Series Adder by EK Archery

36K views 54 replies 16 participants last post by  wb_hunter  
#1 ·
Hello, does anyone own a Cobra R-series Adder by EK archery they’d bought as a novelty amd want to part with? I can offer payment via PayPal immediately for one. It looka like so much fun. Thanks!


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#5 ·
Haha yeah, I can see the idea of a pump action crossbow being a little menacing in the public eye, the guy that designed it got in trouble for posting a video of a knife he made piercing body armor. People need to chill. It looks fun, it’s the only thing I don’t like about it is the videos I’ve seen of it the small proprietary bolts seem to break relatively easily.


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#6 ·
It looks fun, it’s the only thing I don’t like about it is the videos I’ve seen of it the small proprietary bolts seem to break relatively easily.
As I see it, they are standard bolts (perhaps vertical-bow diameters), only shorter, and two-fletched.
I don't own one either, but I've seen the slingshot channel videos.
 
#7 ·
#8 ·
Tried to buy one from Germany or Austria or wherever it was, they would not ship to Canada ...
Most probably an import/export issue.
I had occasionally ordered microchips stuff from the US, and had to answer intimidating questions about it's use. And sign a declaration to not ever use it in a military context. Plus a hefty customs fee and transportation costs.
So, I can easily understand smaller European companies not wanting to go through that hassle.

As far as the technical details, this thing is basically a modified EK Archery Cobra xbow. Not the first choice for the hunting-oriented US customers.

That dealer (a favourite of mine for vertical bows) has the base model:
https://www.bogentandler.at/en/ek-archery-cobra-system-r9-pistol-crossbow-deluxe-package-6103
You could try to contact them, but I don't want to raise hopes .. :rolleyes:
 
#11 ·
Even in the uk they are like gold dust.
The company cant manufacture them fast enough.
They are on pre-order here with three months wait.
Each supplier only received six and they sold in minutes
Ive managed to get one one, after waiting a month.
should be here monday.
They all have small proprietry arrows, nocks,vanes same width as bow arrows.
7.5" carbon for the magazine which can be fitted with 2 blade broadheads.
Also single shot 15" also can be fitted with broadheads.
Latest information is they are testing to increasing the 130 Ib draw
to 150-180 still not really a good hunting choice,
But accurate and powerfull upto 40 yards or so.
I will give you a run-down when it arrives.
Can also look out for one for you.
I think Some retailers will send to america here.
you will have to pre-order though.
Email gary at outdoorhobbies he might be able to
help you get one.
 
#12 ·
Still waiting to read a report from someone who has actually used one of these RX Adders. There are limitations to importing certain crossbows into Canada. Pistol-style ones cannot be imported. Actually specified in govt. regs. We tried to import one some years ago for a film project and it was seized by Canadian Customs. That's why I'm leery about trying to bring in the Adder without hearing of someone who has done it.
 
#42 ·
I purchased the adder crossbow about 8 months ago and have to say it’s the coolest. It’s definitely NOT for children as it packs a good enough punch to take down a deer. I had to build a special target for practice because a regular archery target allowed the arrows to penetrate to deep which messed up the fletch. 50 layers of t-shirt material in a mesh seed bag works well and the arrows come right out. Care needs to be taken when cocking to make sure the pump lever goes all the way forward. I was a bit short once and the string didn’t position properly causing a miss fire which destroyed the carbon bolt and the serving on the string. Gave me a chance to try restringing with the included 2nd string and it worked like a breeze. I purchased mine from www.gogun.co in California and took a couple months for the overseas container to arrive the get shipped across US to my location. I build a hard shell gun style case for mine so I could store safely and keep track of everything. These adders are really popular and I’ve noticed the price has gone up quite a bit since I bought mine. The bolts ARE special and from my research don’t try the eBay or Amazon ones because they will mess up and you don’t want to take the chance. You can make your own or have a friend do it for you but take care with sizes and measurements. Sorry to be long winded but I’m impressed with the crossbow.
 
#16 ·
Hi Everyone,

US and Canada customers can order the Cobra Adder from gogun.co. I've been working with Jörg Sprave to set up distribution in North America. We should be shipping in September! I do have one Adder (as a sample) they're awesome!

Matt
Thanks for your reply. Wondering if the model you are offering has the 90 or 130 draw? Is it too late to get September delivery? Is your sample for sale or was that just a tease:) does gogun ship from USA? Ive been finding that anything I mail-order from usa is super-expensive and super -slow to get to my Canadian doorstep. Last thing was a $7.88 electric connector that ended up costing an additional $40 in shipping and duties. Plus still waiting for it a month later!!
What would be the delivered cost from gogun to Canada for the crossbow?
 
#15 ·
I have seen the "normal", non-repititive Cobra is available in North America through Coldsteel, especially as "Coldsteel Cheap Shot". Albeit I don't understand this name (or better, the motivation behind it).
And I can only see the 130lbs variant (available in Europe as RX), in that greenish color.
I have a R9 base model with 90lbs, coming only in black.
 
#23 ·
I wouldn't hold my breath for higher draw weights.
The 90 lbs Cobra (which is the same platform) gives you a KE of about 19,5 ft-lbf, with 130 or 150 lbs you get proportionally more. Still not enough to hunt larger game. It is still a "large xbow pistol", with only 7,5" draw length / power stroke.
IMHO it just was not designed with hunting in mind.
 
#24 · (Edited)
I'm not really much of a hunter, I'm just plinking with it, but a bit more power certainly couldn't hurt. Would be good for some longer ranges. I think you probably could hunt deer with it using broadheads if you wanted to though. I wouldn't want to go for anything bigger though, but then there isn't anything bigger in most countries anyway!

I think with a 150lb draw weight and having a total length of 32" would safely put this in the realms of a carbine crossbow rather than pistol haha
 
#34 ·
Just want to add some info to this topic, in case anyone is considering to buy an Adder. Currently have 3 other crossbows (2 Excaliburs and a Scorpyd), but I fell in love Jorg`s invention on YouTube. I`m using it over 1,5 month now and here`s what I think.

The 130 lbs version is too powerful for the cheaply made factory bolts. No detailed info on the shaft, insert etc. I ruined 3 of them in the first 10 minutes of my 1st shooting session. The vanes are too weak, and even a 1/4" penetration into a target can tear them easily. Also got a nock failure caused explosion (the top part of the half moon broke off) in the magazine, which, - beside ruining the bolt and the string - busted a hole in the front end of the magazine ($299 for a new magazine, I`ll detail the overpricing later).
The average bolt weight is 195 grain (factory), which is borderline light for the 130 lbs imo. I think 205-210 should be the minimum. The orange aftermarket (not saying "chinese made" since I believe the factory bolts are Made in China too) versions on Amazon are slightly heavier (210 grains average), but won`t even fit in the magazines. They are too long, and the vanes are about 3/4" from the nock (1/2" on the factory bolts). By cutting them down to the proper size makes them lighter, but still a hair over 200 grain.

In spite of the warranty warnings I started to make my own bolts almost right away. First, just replaced the damaged vanes (2" Boehning Blazers are perfect imo), then bought and modified a dozen orange variants from Amazon. Then I came across 2 extremely useful videos by Mike H on YouTube (Cobra RX Adder arrows are too proprietary, and Cobra RX Adder arrow building). I followed the basic ideas, but also improved some. For example: instead of cheap arrows from Amazon, I used Black Eagle Zombie Slayer shafts (300/.003) which gives a solid weight (over 200 grains) and reliability (I`m using the crossbow versions with my Excaliburs over 6 years without ANY issues). I made a wooden template, so I can copy the shape of the factory vanes almost 100%. Almost, because the Blazers have pointy front, which helps to survive even deeper penetrations. I went through the modification of regular arrow nocks, but it`s very time consuming and the results are not really consistent, so I wouldn`t recommend that path. The nocks from AliExpress (the link is available in the discussion section of the 2nd video) are better made than the factory nocks imo. The base is slightly beefier, the half moon is 1/16th wider. Still, after about 25-30 shots you can see some scratches on them, and since the first nock failure I don`t take any chances: discarded and installed new ones. Still, the nocks are the biggest issue with the 130 limbs. They go fast if you shoot a lot (which I think is the reason to have a repeating crossbow).

Most of the factory accessories are way too overpriced, especially because a lots of those are cheaply made, poor quality. The fore mentioned 7 shot magazine is well made, but HALF of the price of the WHOLE CROSSBOW! 5 nocks for $8.99? I paid $13,68 (with shipping!) for 100 on AliExpress. The $30+ laser that came with the crossbow wasn`t good enough to keep my cat busy with it. The one I got from Amazon for $27 is visible from a 100 yards in a sunny day, has the proper screws for windage/elevation adjustment AND a remote pressure switch. $4,50/factory bolt, as oppose to $2,20/my Zombie Slayer based top quality bolts. I also use 60xString made strings. $15 more than the original, but at least they are Made in USA.

Other minor issues:
The cocking lever has a lot of side-to side movement, which could be fixed with washers at the top joint (front of the crossbow), and at the joint that connect the lever to the arm, coming down from the trigger.
The 2 trigger "claws" that release the string have a very rough, squared top edge (you can feel it with your fingers), and that chews up the serving faster even with religious lubricating. A flat file and a couple of minutes of careful rounding the said parts can save your serving and ensure smoother string release.
The screw that secure the magazine gets loose with a couple of shots, so needs to be checked/retightened frequently.

Since I use my bolts, and fixed the minor issues, I`m very happy with my Adder. I decided to post this, because I saw some disappointed comments with the Adder in the past week, and I think my findings could shed some light. And 1 more thing: I wouldn`t recommend this platform for hunting.
 
#35 ·
In spite of the warranty warnings I started to make my own bolts almost right away. First, just replaced the damaged vanes (2" Boehning Blazers are perfect imo), then bought and modified a dozen orange variants from Amazon.
As did I.
The factory bolts/arrows have the 0.245" ID of the carbon arrow shafts which are standard for vertical bows, with plenty of inexpensive components (inserts, tips, vanes, nocks). And that's what I used.
Just the standard nocks need a little rework.
And, as mentioned, I shoot the plain "Cobra". The Adder update costs far more than it's worth to me.
 
#40 ·
FYI - found an ad for the next Cobra version, this time a compound one, with 300fps:
Anyone heard of it yet ?
Some shops around here (Europe) have it on their website, with a "coming someday soon" remark.
BTW, there are two identical versions of that ad video, one from EK and one from Poe Lang... ;)
 
#47 ·
Thank you @wb_hunter .
My point is that according to the Canadian Criminal Code (and trust me, I get/have to check that section fairly often) there is nothing preventing the Cobra from being imported, sold, purchased and used in Canada and as far as I know the Adder either.

...and what I mentionned about customs agents interpreting or literally disregarding the actual laws is not an urban legend either. In my case their M.O. lately is (and keep in mind I'm talking legal items I can back the legality of and right to own with documentation):
Receive said item and return it to the seller without notifying either party.
In the meantime you receive no tracking updates, it stays on "Shipment submitted to border agents for review" for weeks...
You call Canada Post or courier, they refer you to the CBSA... you call there they tell you to wait a little longer, they can't do anything, should release soon..
Days go by then BOOM! You get a tracking update! ...but wait what? Its back in its originating country?!?!?! Sure enough the seller contacts you to let you know that in the best of cases they only damaged the original boxing, at worst they sent it back utterly fcked.
Sometimes you receive a letter giving you the option to contest their decision... like a month too late when the item is either trashed or long gone, your relation with the store you did business soured and the whole weight of going thru that process entirely on you....
Democracy, am I right?
 
#50 ·
Finally got a chrono yesterday, and testing the speed of my Cobra was one of the first items on my list.
With my selfmade bolts (about 223...225 grain), I measured 233fps. Which gives me about 26.5 ft-lbf.
One measured with 240fps, but it turned out to be only 205 grain. With the same length, nock and tip, the difference is the shaft. I used all kind of spent vertical bow arrow shafts for this bolts, and this was a lighter one ...
 
#55 ·
Not new, but this thread seems most appropriate ...
Visiting my parents with their huge backyard over Christmas, I was able to shoot some of my crossbows again without neighbours raising their eyebrows.
One thing I did was testing the Cobra for distance. Using my self-made bolts (about 245gn), I get speeds in the low 200's, which usually results in distances of 250...300 yard.
Shooting 4 bolts at about 45° angle (instinctive, not measured) I got distances between 265m and 285m, translating to roughly 300 yard. Not really unexpected.
The shot distances were measured with a rangefinder.
What surprised me was the stable flight, despite of some stronger gusts of wind.
When doing the same with a vertical bow, there is usually quite some wobble over the first 50 yards.

I also tried the "integrated" iron sight over larger distances, which is 10 ... 20 yards for this crossbow.
The results were mixed, though.
Not that I am unable to shoot with an iron sight, but the Cobra one is a bit problematic - especially the part functioning as "bead".
Here a photo:
Image


The "red dot" functioning as bead is translucent plastic, in a rather fat frontal bar.
Actually there are three in horizontal alignment, but I covered the outer one's with a black sharpie.
But still, with what should I align the notch here ?!?
Results are usually quite consistent, but too high.

For comparison the iron sight I have installed on my Sanlida crossbow, which gives much more consistent results.
Image


The "bead" is part of the sight this crossbow came shipped with.
At least up to 20 yards, accuracy is as good as with a scope.
 

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