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Amoki · June 7th, 2009, 19:58

Which JG mechbox is it? IF yours is the one that come with the Red Piston, there is no reason whatsoever to change anything inside aside from a piston swap if you are pedantic. Air compression in a stock JG is fine as it is. But all JG guns that I have come across have good stock air-sealing to start with anyway.

Your anti-reversal latch problem reminds me of the old-type JG v2 mechboxes though. The biggest tip to working a old-type JG mechbox: keep a small wrench nearby. On the old JG HK416 that I have, a small wrench to hold the anti-reversal latch down when I put the mechbox back, and pull it out at the last minute. No such problem in the newer JG mechboxes now that their mechbox case has been redesigned.

The fact that you didn't say anything about air compression testing, tells me that there is a good chance that by swapping to a CA nozzle, you may be losing air-sealing in the cylinder-head to air-nozzle area. Inconsistent FPS output may lead to large groupings.

Accuracy issue could stem from the hop-up rubber needing time to settle, to problem with the tightbore barrel itself. The stock JG hop-up rubber is crap though, so the CA one is a right step in the right direction.

CA barrels has improved their game from years ago what I've heard - but then again, Vanaras (RSOV) 6.03mm Tightbore is my preferred barrel. But when your JG M4 may possibly come stock with a 6.04mm barrel already (it is a 6.04mm barrel on my JG HK416), why go and change it?

Lastly: that spring guide you have there sounds like a version 3 spring guide, definitely not a version 2. Version 2 spring guides don't come with big "ears".

What I suggest you do:
1) Check your mechbox air compression all over again and fix it. Make sure by the time you put everything back your air sealing is perfect.
2) then swap hop-up rubbers. I like Guarders clear buckings, they are super-thick, they give good air seal, and they're cheap
3) if your grouping still sucks it has to be the barrel.

June 7th, 2009, 19:58	#8
Amoki Trader rating Join Date: Aug 2007 Location: Aotearoa	Which JG mechbox is it? IF yours is the one that come with the Red Piston, there is no reason whatsoever to change anything inside aside from a piston swap if you are pedantic. Air compression in a stock JG is fine as it is. But all JG guns that I have come across have good stock air-sealing to start with anyway. Your anti-reversal latch problem reminds me of the old-type JG v2 mechboxes though. The biggest tip to working a old-type JG mechbox: keep a small wrench nearby. On the old JG HK416 that I have, a small wrench to hold the anti-reversal latch down when I put the mechbox back, and pull it out at the last minute. No such problem in the newer JG mechboxes now that their mechbox case has been redesigned. The fact that you didn't say anything about air compression testing, tells me that there is a good chance that by swapping to a CA nozzle, you may be losing air-sealing in the cylinder-head to air-nozzle area. Inconsistent FPS output may lead to large groupings. Accuracy issue could stem from the hop-up rubber needing time to settle, to problem with the tightbore barrel itself. The stock JG hop-up rubber is crap though, so the CA one is a right step in the right direction. CA barrels has improved their game from years ago what I've heard - but then again, Vanaras (RSOV) 6.03mm Tightbore is my preferred barrel. But when your JG M4 may possibly come stock with a 6.04mm barrel already (it is a 6.04mm barrel on my JG HK416), why go and change it? Lastly: that spring guide you have there sounds like a version 3 spring guide, definitely not a version 2. Version 2 spring guides don't come with big "ears". What I suggest you do: 1) Check your mechbox air compression all over again and fix it. Make sure by the time you put everything back your air sealing is perfect. 2) then swap hop-up rubbers. I like Guarders clear buckings, they are super-thick, they give good air seal, and they're cheap 3) if your grouping still sucks it has to be the barrel. Last edited by Amoki; June 7th, 2009 at 20:19..