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Old 03-06-2013, 10:31 AM   #31
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After I got rhop installed on my PSG, I only ended up getting 200ish ft effective range. But I am only using .28s. I could probally get more range if I took more time tuning it in.
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Old 03-06-2013, 11:30 AM   #32
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I'm getting somewhere between 250 and 300 ft effective range. Once Cheese gets his shop back up I'm going to have him install the er-hop for me.
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Old 03-06-2013, 09:19 PM   #33
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I can get out to 250ft+ if I tuned it in as to where the bb actually hops in the middle of the shot. I was more interested in getting a flat shot and extended range. I can only get out to 200ft with .28s and having a flat shot. 8/10 hit within a 12inch group.
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Old 03-06-2013, 09:34 PM   #34
 
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Heck, I get 300 ft, and a 250ft or so effective range with a stock bucking, a short aeg inner barrel, and .4's in my M28. Only things I have done is wrap my bucking, and cylinder head threads with teflon tape, did the Tdc mod, and made extra inner barrel spacers.

Soon I will be doing the oogoo mod to my hopup/inner barrel.

I can only imagine the difference!

Last edited by ~Ranger~; 03-10-2013 at 07:44 PM.
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Old 03-10-2013, 07:25 PM   #35
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Thanks for share,a long story,great!
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Old 03-29-2013, 05:44 PM   #36
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My friend Dave decided to r-hop his KJW gas rifle, but unfortunately after buying and importing the kit, he managed to bodge all of the little r-hop bits. He works in a garage, and hence he decided to try a new method of R-hopping.

He had a load of sillicon gasket sealant lying around. This stuff is like 3 for a massive tube. This stuff is fantastic: it's a liquid that sets into a rubbery, tough, highly flexible substance. When put into gaskets, you can stab it with a knife and it won't break.

He found himself a perfectly-fitting pin for his barrel, which is exactly the right size. Weirdly it was a g36 body pin. After wrapping this once in tape to snugly fit the barrel he put it in, and then poured in the gasket sealant.

This is the end product:





Whilst it is in the barrel, you can poke it quite vigorously with your thumb and it's going nowhere- it's really stuck in! It's also highly flexible- it feels like poking a taught balloon of reasonable thickness.

After testing the hop unit, it was highly effective. After putting 2-300 rounds of .25 to .3gram BBs through the gun at ~400fps, he took the gun apart to check the wear on it: there was none. Using another pin, he poked the sealant out of the hole, and re-did the process and received the same results- it's not a fluke.

I lent him some .4gram BBs, and he found that after 50/60 shots the sealant started to look a little worn, but still held together well without any flaking. You can see in the second picture, after over-hopping .4gram bbs for another 100 shots or so, the hop rubber started to deteriorate.

As I said though, .3grams went many hundred shots without ANY sign or wear.

The thing with this stuff though, is instead of costing $20 for three shitey little bits of rubber that I'm pretty postive has been cut out of pen grips, you can have a tube for $5. And you've got a good 3000 hop rubbers....

If anyone can try this out, or highlight a flaw with it, I would be grateful. Looks legit to me.


Also, SHOULD this be taken up as quickly as the r-hop, h-hop, i-hop etc, my friend has requested that you you turn his name "Dave" into a verb. e.g "I'm going to Dave my rifle tonight" :P The poor lad gets confused by the various hop names.
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Old 03-29-2013, 11:29 PM   #37
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Been done before, it's called "J-hop" and there's actually a testing thread on the board somewhere.

The only flaw I see is that I sure wouldn't want to have to take apart my rifle after firing only a few hundred rounds.
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Old 03-30-2013, 04:56 AM   #38
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Ahhhh, Dave will be so disappointed. He didn't have to on anything below .3s,.
I'll go and have a ganders at the j-hop.

So many different hops. What a ball(bearing)ache.
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Old 03-30-2013, 07:39 AM   #39
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Sorry to say, but been there done that. There is already a thread linked on the first post about the j-hop. It was concluded by Vindi that the rubber is too soft, and after a little while chunks can be torn off by the bbs.
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Old 04-01-2013, 04:24 PM   #40
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Are there any alternatives for the little rubber r-hops that people know of? Dropping 20 on two or three tiny pieces of rubber is OTT for me. Has anyone found any suitable substitutes?
As previously mentioned, the rubbers look suspiciously alike to the rubber grips found on pens. Very tempted to try.
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Old 04-01-2013, 04:34 PM   #41
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I would think the rubber grips on pens are too soft, but you can try. Keep in mind, these things never wear out if done right, and you get three of them. One bucking is a little bit less than that, but you only get one of them that wears out a lot faster, and it doesn't give as good performance. You could also try the j-hop, but as Vindi found out, after a little while pieces start to rip off.
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Old 04-01-2013, 05:06 PM   #42
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But it's exponentially cheaper....
Althought it takes quite a bit of silicone and time to finally get it right. I'd say you become efficient at creating them about 1/3 into your first tube of silicone caulk...
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Old 04-01-2013, 05:56 PM   #43
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I can't help but think that the gasket sealant would be much much more resistant to wear than the oogoo and sillicon stuff mentioned previously. Gasket sealant is pretty frickin' tough stuff, and I wouldn't mind having another look at its durability.

If it can seal gaskets on trucks, it can seal my gun.

Shall keep my eyes open still for rubber of the same texture to the r-hop rubbers. I'll be damned if I fork out that much on yet more "rubber bits" :P If all else fails, I suppose it would be cheaper for me to buy a hard hop bucking and chop/grind that up to make my own r-hop.
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Old 04-01-2013, 06:00 PM   #44
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Keep in mind when you are sealing a gasket on a truck, it is over a much larger surface area than a bb hitting it. The bb has much more concentraded force. If it is stronger though, it should work. The texture you want is as smooth as possible. That's why HS5 recommends at least 400 grit sand paper for the r-hop, and 600 grit for the ir-hop. Even then it takes a little breaking in until it reaches it's full potential, when the bb smooths out the surface even more.
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Old 04-02-2013, 02:35 AM   #45
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I have done some research on what the R-hop is actually made of. I've found close matches, but will not publicly share it, since it'd be unfair to HS5.

If you need more info, you can pm me, or contact Jonesey, who also has found close matches.
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