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Prometheus 6.03 Stainless Tightbore 363mm

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Old March 3rd, 2015, 01:27   #1
CidP90
 
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Prometheus 6.03 Stainless Tightbore 363mm

Hey everyone,

So I just ordered a Prometheus 6.03 Stainless Tightbore, and having never replaced an inner barrel before, I just have a couple questions.

I should mention the Tightbore is going on an ICS M4A1 (Full metal) rifle (Dual split gearbox).

Based on the research I've been doing, do I need to:

A) Completely disassemble the hop up to replace the inner barrel?

OR

B) Turn the hop up all the way up and physically pull the inner barrel out (and swap pieces)?


I found this online which is making me think B) is the right choice (and easier too):

https://www.youtube.com/watch?v=0XfF9itDss0

Should also add I haven't tinkered with the hop up once yet, not even to modify it's BB trajectory.

Any replies would be much appreciated!
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Old March 3rd, 2015, 01:44   #2
pestobanana
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Swapping the barrel is pretty easy. Take the C clip off, and turn the hop up unit upside down so the nub doesn't fall out after the barrel is out. Pull out the original barrel, take the rubber and slide the sleeve over your new barrel. Put the new barrel in, stick the C clip on and look through the barrel while turning the wheel to make sure everything still works.
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Old March 3rd, 2015, 11:48   #3
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In the case of an ICS hop-up, if you move/drop the nub by accident, only remove the cross-pin that holds the adjustment arm in place.

Even replacement hop-up units come with the dial ring already clipped, no need to remove it.

But yeah, basically set hop-up to zero, then remove barrel clip and pull the barrel. Sometimes you need to slightly twist it as it gets out because the rubber is stuck to the chamber. Not much more than 1/16 of a turn each way.
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Old March 3rd, 2015, 13:48   #4
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Perfect - thanks for the replies.

Just waiting on the tightbore to be shipped in, I'll keep these things in mind when I swap it.

Thanks again!
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Old March 3rd, 2015, 15:45   #5
Rusty Lugnuts
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consider upgrading to this..http://www.icsbb.com/web_e/html/02_p...ind3=&num=1288 Way better than the old style & fits with no modification
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Old March 3rd, 2015, 20:35   #6
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Originally Posted by Rusty Lugnuts View Post
consider upgrading to this..http://www.icsbb.com/web_e/html/02_p...ind3=&num=1288 Way better than the old style & fits with no modification
I'm highly tempted to pick this up, even though my current hop up is working fine lol. That being said who sells this? Had time to do a quick search and I couldn't find anything local
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Old March 4th, 2015, 09:23   #7
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Isn't Mach1 a pretty big ICS dealer?
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Old March 4th, 2015, 13:56   #8
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Isn't Mach1 a pretty big ICS dealer?
Looks like they are, don't see the metal version of it though
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Old March 5th, 2015, 11:46   #9
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Metal is not always good..

The stock ICS hop-up is by far the best M4-type hop-up system out there.
Making it metal is not needed, it works fine in plastic.

Metal does not flew, plastic does. Flex lets the part sit right when not everything is perfect, and seals better...
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Old March 11th, 2015, 00:16   #10
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Quote:
Originally Posted by pestobanana View Post
Swapping the barrel is pretty easy. Take the C clip off, and turn the hop up unit upside down so the nub doesn't fall out after the barrel is out. Pull out the original barrel, take the rubber and slide the sleeve over your new barrel. Put the new barrel in, stick the C clip on and look through the barrel while turning the wheel to make sure everything still works.
So tightbore came in - did the swap and for the life of me I'm not sure if I did it correctly. I made sure the hop up was upside at all times when removing and inserting the new barrel. However after everything was said and done, when I turned the wheel, the wheel it self turned however looking down the barrel I couldn't see the nub pushing down, tested it turning both ways, from different angles etc. Unless I just can't tell or the nub fell out (which I highly doubt). The little hole on the outside shows if the wheel is working, which it is, when I turn it I can see the trigger pushing down. However, when looking down the barrel, I can't make out the nub. I might take it in somewhere here to get a professional to look at it - just in case. Planning on going in the next few days
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Old March 11th, 2015, 00:21   #11
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Quote:
Originally Posted by CidP90 View Post
So tightbore came in - did the swap and for the life of me I'm not sure if I did it correctly. I made sure the hop up was upside at all times when removing and inserting the new barrel. However after everything was said and done, when I turned the wheel, the wheel it self turned however looking down the barrel I couldn't see the nub pushing down, tested it turning both ways, from different angles etc. Unless I just can't tell or the nub fell out (which I highly doubt). The little hole on the outside shows if the wheel is working, which it is, when I turn it I can see the trigger pushing down. However, when looking down the barrel, I can't make out the nub. I might take it in somewhere here to get a professional to look at it - just in case. Planning on going in the next few days
Sounds like you might have lost the cylindrical nub that goes on the arm. If you find it, you can just roll it in and guide it with a small screwdriver or something.

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Old March 11th, 2015, 00:39   #12
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with the hop up upside down, and the c clip off, do you see a straight line cut in the barrel? If you don't the barrel is upsidedown.
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Old March 11th, 2015, 00:44   #13
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Quote:
Originally Posted by pestobanana View Post
Sounds like you might have lost the cylindrical nub that goes on the arm. If you find it, you can just roll it in and guide it with a small screwdriver or something.

Just took it apart - good news is the nub wasn't missing. Bad news is the nub wasn't in its proper place. Going to try and fix it right meow!
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Old March 11th, 2015, 01:51   #14
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Hah! Won't believe my own luck but I actually managed to fix it. Getting that nub in absolutely perfectly is an absolute b*tch, but I figured it out in the end! Tested the wheel and she's working beautifully. Now to test it out! Thanks for your help
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Old March 11th, 2015, 08:40   #15
Rusty Lugnuts
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Quote:
Originally Posted by Kos-Mos View Post
Metal is not always good..

The stock ICS hop-up is by far the best M4-type hop-up system out there.
Making it metal is not needed, it works fine in plastic.

Metal does not flew, plastic does. Flex lets the part sit right when not everything is perfect, and seals better...
The metal one is better, it has a slightly different design with less pieces, I bought two of them right from the link that i posted- just contact them (by email) and they will work with you. Sadly our dollar is low right now and two hop ups shipped quickly to my house cost $ 68
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