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Old 06-18-2015, 01:18 PM   #151
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Where would I find an R-hop or do I have to make it myself?
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Old 06-18-2015, 06:23 PM   #152
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Quote:
Originally Posted by Jakethetankslayer View Post
Where would I find an R-hop or do I have to make it myself?
You can find them here.
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Old 10-09-2015, 04:31 PM   #153
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I've done some experimentation with Soft 6mm ID x 8mm OD high temperature silicone rubber from Mcmaster. Originally the stuff was WAY too difficult to sand. Even cutting was near impossible, to get a straight cut because of the extreme flexibility. But the 6mmx 8mm soft is perfect for madbull barrels. The depth is perfect. Using a special jig I devised, I was able to cut a perfect patch in the softer stuff, that only required radiusing the leading and trailing edges. The process of radiusing these edges took about 10 minutes no joke. The stuff was that painful to sand even the edges. The good news? It outshot my best semi soft rhop patch out of the same AEG setup, with less fliers and a flatter trajectory to the same range. Has anyone else used the softer stuff? I'm tempted to try the super soft stuff , but that stuff scares me
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Old 10-10-2015, 11:06 AM   #154
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I find the 8mm a tad too sensitive to adjustments. 9mm and sanded down would have better results.

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Old 10-10-2015, 03:09 PM   #155
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Quote:
Originally Posted by fortjp500 View Post
I've done some experimentation with Soft 6mm ID x 8mm OD high temperature silicone rubber from Mcmaster. Originally the stuff was WAY too difficult to sand. Even cutting was near impossible, to get a straight cut because of the extreme flexibility. But the 6mmx 8mm soft is perfect for madbull barrels. The depth is perfect. Using a special jig I devised, I was able to cut a perfect patch in the softer stuff, that only required radiusing the leading and trailing edges. The process of radiusing these edges took about 10 minutes no joke. The stuff was that painful to sand even the edges. The good news? It outshot my best semi soft rhop patch out of the same AEG setup, with less fliers and a flatter trajectory to the same range. Has anyone else used the softer stuff? I'm tempted to try the super soft stuff , but that stuff scares me
Thanks for sharing. I'm actually considering getting some soft (A60 shore) tubing. Not that I think it's better, but it's the only one available for me to purchase for a reasonable price. I enjoyed reading about your experience with this soft tubing cause I didn't think it would perform as nice as harder semi-soft stuff. Now I will definitely try it out; and I'll post my results as soon as I do (Don't expect them soon though, I need to finish my rifle first.)
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Old 10-11-2015, 11:50 AM   #156
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Quote:
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I find the 8mm a tad too sensitive to adjustments. 9mm and sanded down would have better results.

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For my inner barrel the outside was perfectly flush. Same as a tuned 9mm just minus any sanding. I like the lonex hopup for m4 because it isn't sensitive to micro adjustment and since the gears are nylon, you can use blue loctite on the main gear shaft to prevent movement at all. I'm super satisfied with it. I'll do a video soon to show it off. And we all know that softer rubber like the firefly do better/ grip better than hard rubbers, it seems that theory holds water in the concave patches too (in my case this far)

Last edited by fortjp500; 10-11-2015 at 11:53 AM.
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Old 01-31-2016, 11:50 PM   #157
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I have a lot of materials I could use to try R-hop with so I'm wondering which have been tried:

- silicone aquarium tubing
- vinyl tubing
- latex tubing
- polyethylene tubing
- Teflon tubing
- urethane

And some stranger choices I can think of:
- waterproof sandpaper at like 2000 grit
- erasers... vinyl, Staedtler Rasoplast (a black eraser that's a tiny bit gritty), gum erasers, kneadable eraser (very sticky)


And I could get natural (vulcanized) rubber tubing or any of the fuel line tubings easily enough as well. I normally glue it with an anaerobic cyanoacrylate glue.

I'm sure lots of these materials have been tried. But I'd be willing to try to make r-hop patches out of the others if they're interesting to anyone.
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Old 02-01-2016, 12:57 AM   #158
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I would be interested in hearing your results. HS5 tested materials you listed if i recall and found the semi soft silicone to be the best balance of performance ease of install. As I said, the softer rubbers should provide better grip and shoot more consistently. But I learned first hand that cutting the soft rubber tubing perfectly is no easy task. I have done it and using a power tool, i was able to radius these soft patches in a timely manner. I didn't do a formal comparison. but i got really good results from the soft
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Old 02-27-2016, 08:14 AM   #159
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Is there someone from the U.S. that could order 25 feet of the high temperature silicon tubing from McMasterCarr (McMaster-Carr) and ship it to me? I'll gladly pay you through PayPal. I'm looking specifically for the semi-clear blue semi-soft tubing (IR-hop material, or so they say).

I also would like some sorbothane padding, 70D hardness.

If someone could hook me up, greatly appreciated.
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Old 04-18-2016, 02:59 PM   #160
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Hey there,

would anyone be so kind and buy a feet or two of that material at mcmastercarr and ship it to good old Germany? Mcmastercarr wouldn't bother to do so - too much of an effort, I guess. Yea, customer is king - my ass. Of course I would pay up front for the material and the shipping. Help is very appreciated.

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Old 07-07-2016, 09:04 AM   #161
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Following on from the last couple of posts. I tried to order the silicone tube from McMaster-Carr this week from the UK. They now have the following official policy:

"Due to the cost of complying with extensive US export regulations, McMaster-Carr accepts international purchases only from our established international customers."

Also, following an enquiry as to how one might become, or who is, an "established international customer" :-

"McMaster-Carr has decided to limit its international business, and we do not have any agents outside of the United States. We apologize for the inconvenience."

Would it be possible to update the original post to point out that McMaster-Carr will only ship inside the USA please? It would save those of us in the rest of the world wasting time trying to buy the material. There isn't anything on their website to stop you ordering the product and a transaction apparently completes. You then get a cancellation email from McMaster-Carr. The other info above is from subsequent follow up emails with them.
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Old 07-28-2016, 01:17 PM   #162
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Even if not from McMaster-Carr, has anyone been able to get a similar material outside U.S?

Edit: I already asked something similar in another post. I asked here as well so the info is in this sticky also, where it could be more useful for other people.

Last edited by LeChuck; 07-28-2016 at 01:25 PM.
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Old 10-17-2016, 11:20 PM   #163
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It's been quite a while since I've been active on here, other than the occasional post.

I made this thread with the intent of it being a question stopper so ASF doesn't get an endless supply of the same questions being asked repeatedly. I may not be actively contributing anymore, but I'd at least like to maintain what I have already contributed. Obviously, technology advances, so something has to have happened since I last updated the first post over two years ago.

If anyone wants me to add any links to threads or information about the r-hop, or any other letter-hop for that matter, let me know and I'll see if it's worth adding.

The last thing I said in the first post still stands:
Quote:
Now after searching through the forum for a while, I didn't exactly look at the threads too closely, so if I missed some threads or if I should remove some, just let me know. If you guys think I should change around the title/subject for a thread, just let me know. Even if it's something as nitpicky as the ordering, if you guys tell me I will not get offended, it's all to make this thread better.
I'm not sure what made me think of this after so long, just my random thought processes bringing me yet another thing to work on, lol.
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Last edited by Masterjuggler98; 10-17-2016 at 11:23 PM.
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Old 10-20-2016, 01:32 PM   #164
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How do you guys make perpendicular cuts (for the length of the patch, not depth)? I find it rather difficult to trim the length shorter in small increments to get the patches to fit the window properly. I'm, getting some weird BB flight and I'm not sure if it's because of the slightly imperfect cut on one end of the patch or not. It may also be that I was too aggressive with the radiusing of the patch ends but if I can perfect the cuts, then I can rule them out.
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Old 10-20-2016, 07:12 PM   #165
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Put the patch on a stainless steel ruler and use the transparency of the patch and the ruler hash marks to make perpendicular cuts, or square it with a dremel sanding drum after.
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