Crushed Nubbins Anyone?

Scarecrow · August 1st, 2005, 20:11

Does anyone have a problem with the little nubbin in the hop-up on armalite V2 with both systema or Guarder metal hopups getting crushed after very short use? If so, do you have any observations or advice? On two guns I have an ongoing problem with this - I put in new nubbins and within a *very* short period of time (one month?), the hopup no longer functions... I am pulling my hair out of my head...

MadMax · August 1st, 2005, 21:16

So the nubbins come out all mashed or are they missing?

Scarecrow · August 1st, 2005, 21:21

mashed...

MadMax · August 1st, 2005, 21:29

very strange. Do you find that you have to crank the hop up all the way up when you put everything back together? I'm wondering if the hop up window might be improperly lined up with where the nubbin pushes down on the hop up sleeve.

Scarecrow · August 1st, 2005, 21:56

Gump installed them both for me, so I am assuming there are no installation issues, as he knows what he is doing.

I tune my hopup by putting it to the max to get it to go "up" and then pull back a bit at a time to maximize distance...

JoeyJackhammer · August 2nd, 2005, 02:26

try making a new one from wire insulation, and only go about half hop and adjust from there. The Metal hop up may have more range then the stock one and it is too far in, and getting hammered against the window. My Tanaka M700 took the entire hop up assembly minus the dial out the barrel with it, so anything's possible.

MadMax · August 2nd, 2005, 03:06

I'm baffled. I can't imagine how the nubbin is getting pressed that hard. There's some compliance in the hop up sleeve bump. What does the nubbin look like when it's mashed? Is it smeared out or is it just folded flat? It might help to replace the nubbin with a small bit of urethane tubing which is more resiliant.

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August 1st, 2005, 20:11	#1
Scarecrow A Total Bastard Trader rating Join Date: May 2003 Location: Tottenham	Crushed Nubbins Anyone? Does anyone have a problem with the little nubbin in the hop-up on armalite V2 with both systema or Guarder metal hopups getting crushed after very short use? If so, do you have any observations or advice? On two guns I have an ongoing problem with this - I put in new nubbins and within a very short period of time (one month?), the hopup no longer functions... I am pulling my hair out of my head... __________________ LIKE us on Facebook!!

August 1st, 2005, 21:16	#2
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	So the nubbins come out all mashed or are they missing? __________________ Want nearly free GBB gas?

August 1st, 2005, 21:21	#3
Scarecrow A Total Bastard Trader rating Join Date: May 2003 Location: Tottenham	mashed... __________________ LIKE us on Facebook!!

August 1st, 2005, 21:29	#4
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	very strange. Do you find that you have to crank the hop up all the way up when you put everything back together? I'm wondering if the hop up window might be improperly lined up with where the nubbin pushes down on the hop up sleeve. __________________ Want nearly free GBB gas?

August 1st, 2005, 21:56	#5
Scarecrow A Total Bastard Trader rating Join Date: May 2003 Location: Tottenham	Gump installed them both for me, so I am assuming there are no installation issues, as he knows what he is doing. I tune my hopup by putting it to the max to get it to go "up" and then pull back a bit at a time to maximize distance... __________________ LIKE us on Facebook!!

August 2nd, 2005, 02:26	#6
JoeyJackhammer Trader rating Join Date: Jun 2004 Location: Moose Jaw, SK	try making a new one from wire insulation, and only go about half hop and adjust from there. The Metal hop up may have more range then the stock one and it is too far in, and getting hammered against the window. My Tanaka M700 took the entire hop up assembly minus the dial out the barrel with it, so anything's possible. __________________

August 2nd, 2005, 03:06	#7
MadMax Delierious Designer of Dastardly Detonations Trader rating Join Date: Dec 2001 Location: in the dark recesses of some metal chip filled machine shop	I'm baffled. I can't imagine how the nubbin is getting pressed that hard. There's some compliance in the hop up sleeve bump. What does the nubbin look like when it's mashed? Is it smeared out or is it just folded flat? It might help to replace the nubbin with a small bit of urethane tubing which is more resiliant. __________________ Want nearly free GBB gas?

Crushed Nubbins Anyone?

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