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Cobra R-Series Adder by EK Archery

37K views 54 replies 16 participants last post by  wb_hunter  
Hi Matt,

Any news on a further increase of bow limb strength on these? Some more power would make it perfect.

I've bought one, they're great fun and feel very well-built. Very accurate (but I've only fired it at 10 m so far), will be firing it at 20 m and 30 m soon but sure it will be capable. Literally my only fault with it so far is the fact that the bolts are proprietary and fairly difficult to make if you wanted to do your own, however it's possible.

I love the fact that it has picatinny rails all over it, makes customization easy and there are lots of accessories you can use.
Jörg told me they are working on a 150 lb limb for it, however, I am not sure when that will be available. Could be 2 months, could be 8 months. Lots of stuff in the pipeline you guys will love :)
 
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?
The adders by default come with 130 lb limbs. I have about 40 crossbows left for the "September" shipment (which is now looking more like early October for north America customers).

My sample is not for sale :)

Gogun.co ships from the US, so yes, it will be slow to get to Canada (probably 3 weeks from when it ships from USA).

To estimate delivered cost to Canada, assume ~$30 for shipping, and then $90 for import fee, so it will go from $449 -> $569... somewhere around there I think? plus or minus $15 ish.
 
Hey, thanks for all this info. Was hoping it'd be 160lbs minimum but I'll take an upgrade as it comes!

Heard you guys are selling out of Adders, very glad it's so popular. Strange that you don't see more posts about it anywhere though!

One more question. When you buy from Gogun there is a side mounting device for a laser/flashlight. I bought mine from a local supplier so I didn't get that - would you be willing to sell that separately?
Yes, we do sell it separately (Cobra RX Adder Accessory Mount), However, If you don't already have it, my honest recommendation is to just buy a flashlight & laser that mount directly to Picatinny rails (if your country allows this).
 
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.
Wanted to respond to this.

Earlier in 2020, we gave feedback to Ek Archery that the plastic nocks were breaking way too much. They reformulated the plastic, and any of our bolts now sold as of January 2021 should be using the new much more durable plastic. They should last MUCH longer. This was the biggest issue with the arrows.

The V2 magazine is expensive when you buy it alone. The reason for this is we would like to discourage people from buying the adder from unofficial non-gogun retailers and then buying the V2 magazine from us.

Every once in a while there is some grey-market importer that gets their hands on some adders, and puts like 30 of them on amazon or ebay and mark them way up. People purchase them because they are promised quick shipping times, and then they offer NO customer service, returns, or warranty.

When people buy from non-gogun retailers, Jörg doesn't even see a penny for the years of work he has done. So, we came up with the V2 magazine that improves the adder significantly but can only be purchased from GoGun.de and GoGun.co retailers. It's pretty affordable when purchased as an adder + V2 mag bundle, but it is expensive if purchased alone. We hope people do the math, and understand "Since this V2 mag is so much cheaper when purchased with an adder, I should buy my adder from gogun as well instead of this sketchy ebay listing"

The accessories (laser and light) are admittedly expensive. I am trying to find a better supplier. The issue is the accessory mount is designed for a specific diameter laser and flashlight. It is not a super common size, so it's hard to find something that will drop in as a replacement. If you find something that works, let me know!

Of course, some customers will choose to buy a high-powered light and laser combo that mounts directly to the pic rail from their local gun shop. Works for folks in the US, but maybe not all other countries due to various regulations. There is a bit of a tradeoff that happens when trying to supply something that will be compatible with a wide range of national regulations.

Yes, there is a small amount of side-side in the cocking lever. I've never found it to be problematic or something I've wanted to modify, though some people are into that kind of stuff :)
 
I think the reformulated plastic for the nocks is a good step, but the company also should take a look at the shape as well. On the picture the middle one is the original, and the difference in the base thickness (where the nock meets the shaft), and the taper down is obvious. The aftermarket nocks stay parallel with the shaft a little longer, before they narrow down and that results a much better energy transfer imo. And EK Archery also should explain why we have to shoot regular archery arrow shafts (instead of crossbow bolt shafts) with a CROSSBOW. Even the best arrow shafts are rated under 100lbs, and most crossbows require a bolt shaft over 100bs (according to the arrow selection charts/ poundage ).

As for the V2 magazine pricing. Yes, with the combo purchase it is cheaper. But what about a replacement for a reasonable price for those, whom already bought one from Gogun? I got a gaping hole in the inside of mine because of a factory arrow failure. It doesn`t effect the functionality, but I`m not willing to spend $300 to fix a cosmetic issue. And honestly, if it was a function issue, I`d rather build another myself, just as good or better. I understand the "support the inventor" part, but the hefty price tags can discourage ppl from buying from official sources, and - like in my case- could force them to make things on their own.

I still love the platform, and keep enjoying it!
If you've purchased an adder from GoGun before, I will give you a big discount on a replacement V2 magazine. Just send me an email matt@gogun.co

I have no idea why they did not use crossbow arrows or sized the dimensions of the nocks as such. I am too new to the world of crossbows to make a guess.