"Multiplefeeds" with Madbull ultimate hopup

Conker · October 26th, 2010, 15:07

I've installed a Madbull ultimate hopup on one of my uppers (G&G M4 full metal), and most of the time it shoots well, however from time to time it "multiplefeeds" (ie 2, 3 bbs at the same time).

Any idea what can cause this?

(Nozzle is the stock non-cansoft G&G)

EDIT: Tested with both my DBoys lowcaps and my G&P midcaps. It does the same.

coach · October 26th, 2010, 15:14

which rubber did you use? is the nozzle the correct length?

take the madbull hopup and the stock hopup unit and measure them side by side and see if one sits more forwards than the other.

Conker · October 26th, 2010, 15:16

Prometheus with SCS nub.

I'll do it...

EDIT: they seem to sit at pretty much the same place

EDIT2: Tried my other upper (different hopup+barrel assembly) and it just doesn't feed... probably my nozzle or tappet plate I guess. The nozzle does move... but it seems to not go far enough.

cellulose · October 26th, 2010, 16:16

The only problem I had with my Madbull ultimate hopup was it would feed sometimes and other times it would not.

I had discovered that the Deep Fire Metal Nozzle was slightly to long, so I shaved it down a couple mm and now it feeds perfectly.

As for feeding to much, well I'm sorry as I did not have that issue.

Brayden · October 26th, 2010, 18:10

put a bb in the feeding tube, grab a screwdriver and press the off-center of it gently to see if it pushes forward into the hopup, it should but it shouldn't do it easily enough that BBs in your magazine can push more in.

Boyso · October 26th, 2010, 18:30

Hehe.

I've not had this issue with it myself though :P

Conker · October 26th, 2010, 18:34

Considering it doesn't feed at all (nozzle isn't going far enought) in my other hopup/barrel assembly, it's most likely the nozzle and/or tappet plate and not the hopup... ill check that later.

Boyso · October 26th, 2010, 18:41

I can bring you an extra Modify nozzle if you wish to give it a try :P

But I swear, that hopup is damned :P

Amos · October 26th, 2010, 20:32

Yea, I'm not a fan of much Madbull stuff.. and their new hop-up is no exception.

Gunny_McSmith · October 26th, 2010, 23:17

Quote:

Originally Posted by LastSpartan

But I swear, that hopup is damned :P

haha, +1, that why all my local guntechS (yes all of them) dont recommend it...lol
because of the feeding issues .....

damage · October 27th, 2010, 05:20

Madbull Hop Up is a great unit. Inner barrel with hop up rubber is tricky to put in but if you get it right you'll be happy how it performs.

*edit add*

You put the barrel with the hop up rubber wrong yes its either it will not feed or it "multiple" feeds. Installed 3 hop units from clients guns. All are happy with the performance.

coach · October 27th, 2010, 07:58

The madbull hopup is working great for me. Only suggestion is that if you use it with the madbull tight bore barrel, you should use the supplied madbull rubber. (not sure about the new version inner barrels though)

Danke · October 27th, 2010, 11:14

Take out the SCS nub and try it.

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October 26th, 2010, 15:07	#1
Conker Trader rating Join Date: Jan 2007 Location: Canada / Ireland / USA	"Multiplefeeds" with Madbull ultimate hopup I've installed a Madbull ultimate hopup on one of my uppers (G&G M4 full metal), and most of the time it shoots well, however from time to time it "multiplefeeds" (ie 2, 3 bbs at the same time). Any idea what can cause this? (Nozzle is the stock non-cansoft G&G) EDIT: Tested with both my DBoys lowcaps and my G&P midcaps. It does the same. __________________ WTS: King Arms/Madbull Mk18 Mod1 - VFC Mk17 SCAR-H midcap mags, FDE - VFC Mk17 SCAR-H + PWS rail, FDE WTB/WTT: CSOR gear, BFG, Tyr, Crye, etc Last edited by Conker; October 26th, 2010 at 15:11..

October 26th, 2010, 15:16	#3
Conker Trader rating Join Date: Jan 2007 Location: Canada / Ireland / USA	Prometheus with SCS nub. I'll do it... EDIT: they seem to sit at pretty much the same place EDIT2: Tried my other upper (different hopup+barrel assembly) and it just doesn't feed... probably my nozzle or tappet plate I guess. The nozzle does move... but it seems to not go far enough. __________________ WTS: King Arms/Madbull Mk18 Mod1 - VFC Mk17 SCAR-H midcap mags, FDE - VFC Mk17 SCAR-H + PWS rail, FDE WTB/WTT: CSOR gear, BFG, Tyr, Crye, etc Last edited by Conker; October 26th, 2010 at 15:22..

October 26th, 2010, 16:16	#4
cellulose formerly aBseNtceLL Trader rating Join Date: Mar 2009 Location: Winnipeg, MB	The only problem I had with my Madbull ultimate hopup was it would feed sometimes and other times it would not. I had discovered that the Deep Fire Metal Nozzle was slightly to long, so I shaved it down a couple mm and now it feeds perfectly. As for feeding to much, well I'm sorry as I did not have that issue. __________________ Follow me on Tumblr: http://m-sean.tumblr.com

October 26th, 2010, 15:14	#2
coach aka coachster Trader rating Join Date: Mar 2008 Location: T dot	which rubber did you use? is the nozzle the correct length? take the madbull hopup and the stock hopup unit and measure them side by side and see if one sits more forwards than the other.

October 26th, 2010, 18:10	#5
Brayden ¡¡¡ɹǝʞɐǝɹq oqɯoɔ-ɔ-ɔ-ɔ Trader rating Join Date: Sep 2009 Location: Sault Ste Marie	put a bb in the feeding tube, grab a screwdriver and press the off-center of it gently to see if it pushes forward into the hopup, it should but it shouldn't do it easily enough that BBs in your magazine can push more in. __________________ Primary: TM MK 17 MOD 0, ICS L85 A2, Echo1 AKM, Echo1 AK-74, WE AK-74UN, JG AK-47 \| Secondary: TM M9 Proud member of Force Recon

October 26th, 2010, 18:30	#6
Boyso a.k.a. LastSpartan Trader rating Join Date: Jul 2009 Location: Québec city	Hehe. I've not had this issue with it myself though :P __________________ NEW BACON FOR SALE! "WHEN I DIE BURY ME UPSIDE DOWN SO THE WORLD CAN KISS MY ASS" -Platoon

October 26th, 2010, 18:34	#7
Conker Trader rating Join Date: Jan 2007 Location: Canada / Ireland / USA	Considering it doesn't feed at all (nozzle isn't going far enought) in my other hopup/barrel assembly, it's most likely the nozzle and/or tappet plate and not the hopup... ill check that later. __________________ WTS: King Arms/Madbull Mk18 Mod1 - VFC Mk17 SCAR-H midcap mags, FDE - VFC Mk17 SCAR-H + PWS rail, FDE WTB/WTT: CSOR gear, BFG, Tyr, Crye, etc

October 26th, 2010, 18:41	#8
Boyso a.k.a. LastSpartan Trader rating Join Date: Jul 2009 Location: Québec city	I can bring you an extra Modify nozzle if you wish to give it a try :P But I swear, that hopup is damned :P __________________ NEW BACON FOR SALE! "WHEN I DIE BURY ME UPSIDE DOWN SO THE WORLD CAN KISS MY ASS" -Platoon

October 26th, 2010, 20:32	#9
Amos Trader rating Join Date: Aug 2006 Location: Tokushima, Japan	Yea, I'm not a fan of much Madbull stuff.. and their new hop-up is no exception. __________________ Custom Builds: FA3674U Krinkov G3SD6

October 27th, 2010, 05:20	#11
damage Trader rating Join Date: Jan 2005 Location: Port Coquitlam, BC	Madbull Hop Up is a great unit. Inner barrel with hop up rubber is tricky to put in but if you get it right you'll be happy how it performs. edit add You put the barrel with the hop up rubber wrong yes its either it will not feed or it "multiple" feeds. Installed 3 hop units from clients guns. All are happy with the performance. __________________ Team P.I.M.P. Vancouver BC -Guntech(PM or E-mail only) Last edited by damage; October 27th, 2010 at 05:26..

October 27th, 2010, 07:58	#12
coach aka coachster Trader rating Join Date: Mar 2008 Location: T dot	The madbull hopup is working great for me. Only suggestion is that if you use it with the madbull tight bore barrel, you should use the supplied madbull rubber. (not sure about the new version inner barrels though)

October 27th, 2010, 11:14	#13
Danke Prancercise Guru Trader rating Join Date: Oct 2007 Location: Danger Zone	Take out the SCS nub and try it. __________________ Airsoft, where nothing is hurt but feelings.

"Multiplefeeds" with Madbull ultimate hopup

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