AUG shooting weak problem

venture · July 18th, 2011, 22:08

Finally, there is the most baffling case of all.

I got a CA AUG from a customer, he wanted to up the power as it was shooting very weak at 260fps. I put the strongest spring that the GB could turn and yet it still shoots about 260-280 with a 150% spring!!! Should be in the 400-430 range????

I checked airseal at the nozzle, piston head and hopup/nozzle interface. All are quite good. WHERE IS THE POWER GOING???

Urrah! · July 18th, 2011, 22:46

It is curse.

You must punish it by two minutes to midnight.

Styrak · July 18th, 2011, 23:47

Bad hopup rubber? Even if it doesn't look too bad, even slight wear at the nozzle end can greatly affect the airseal. I've seen it quite a few times.

venture · July 18th, 2011, 23:50

Quote:

Originally Posted by Styrak

Bad hopup rubber? Even if it doesn't look too bad, even slight wear at the nozzle end can greatly affect the airseal. I've seen it quite a few times.

You know, it is the next logical thing to try. Thanks, Styrak.

I will update as things develop.

Kos-Mos · July 19th, 2011, 11:02

Does it still have the stock plastic hop-up chamber?
Most of the time, there will be a micro failure right in front of the barrel clip, and under pressure the crack opens and let the air out around the barrel.

Also try an other inner barrel and try without the outerbarrel extension (remove at the vertgrip). It can be bent just enough to put pressure on the inner and cause the BB to slow down near the end of the barrel.

venture · July 19th, 2011, 11:18

well, it was not the hopup ~ bucking or chamber.

thanks kos, that gives me a couple more things to try.

Jimski · July 19th, 2011, 11:26

also you can check if there is a leak between the hop unit and inner barrel...

venture · July 19th, 2011, 20:10

Well I put my Marui hopup with Madbull tb barrel into the thing and it still shoots weak.

I had thought the hopup/nozzle interface had tested well, but upon retesting the problem lies there. Airseal is terrible at the hopup/airseal nozzle. I replaced the nozzle and tried again. Exactly the same, massive air loss.

Any ideas how to fix this problem?

Urrah! · July 19th, 2011, 20:19

What is the barrel made of?

venture · July 19th, 2011, 20:29

The stock CA barrel is brass and the one from my TM is Madbull aluminum TB barrel.

Urrah! · July 19th, 2011, 20:33

Are the barrels clean? Was real gun oil used by accident on any of the parts? Is there maybe an FPS reduction piece in the nozzle?

venture · July 19th, 2011, 20:40

None of the above. It is a case of the nozzle not reaching into the hopup enough or something like that. the air is blowing down the feed tube into the magazine.

Urrah! · July 19th, 2011, 20:52

I'm sorry, but I cannot help you.

Eien · July 19th, 2011, 21:07

Is your nozzle on the cylinder head or on the tappet plate? Sometimes, I accidently put the nozzle in the cylinder head and not on the tappet plate.

Reckless · July 19th, 2011, 21:08

Ron.. this may sound stupid.. but make sure the gearbox is absolutely all the way forward... and the barrel assembly is all the way back and locking in without moving... and that the hop chamber is fitting right up/into the front of the gearbox.

Ive had 2 CA's across my bench ... one was horrid with fitment and matching CA/TM etc etc parts ... the other one one was magic the whole way.

Home	Forums	Register	Gallery	FAQ	Calendar
Retailers	Community	News/Info	International Retailers	IRC	Today's Posts

British Columbia	Alberta
BCAC	EAR
Op-For	JOC
Northern Arms Airsoft	Skunkworx Airsoft
Airsoft Kelowna	RAAT
Prince George Airsoft	Manitoba
Saskatchewan	MAA
SK Airsoft	Ontario
PDW	Airsoft Ottawa
South Sask Mercs	Snow Dragons
Quebec	1st Ranger Platoon
PQAC	Wolfpack Tactical
1st Pathfinders Regiment	TTAC3
Quebec Airsoft
MTX Airsoft	Atlantic
FAQc	Atlantic Airsoft

July 18th, 2011, 22:08	#1
venture Trader rating Join Date: Jun 2005 Location: Halifax	AUG shooting weak problem Finally, there is the most baffling case of all. I got a CA AUG from a customer, he wanted to up the power as it was shooting very weak at 260fps. I put the strongest spring that the GB could turn and yet it still shoots about 260-280 with a 150% spring!!! Should be in the 400-430 range???? I checked airseal at the nozzle, piston head and hopup/nozzle interface. All are quite good. WHERE IS THE POWER GOING??? __________________ Visit us at :www.ventureairsoft.ca

July 18th, 2011, 22:46	#2
Urrah! Trader rating Join Date: Dec 2010 Location: Oil Park, Canuckistan	It is curse. You must punish it by two minutes to midnight. __________________ In loving memory of Omeljan Kuzik.

July 18th, 2011, 23:47	#3
Styrak Trader rating Join Date: Jan 2007 Location: Saskatoon, SK	Bad hopup rubber? Even if it doesn't look too bad, even slight wear at the nozzle end can greatly affect the airseal. I've seen it quite a few times. __________________ Airsoft Sales and Repair/Upgrade Services

July 19th, 2011, 11:18	#6
venture Trader rating Join Date: Jun 2005 Location: Halifax	well, it was not the hopup ~ bucking or chamber. thanks kos, that gives me a couple more things to try. __________________ Visit us at :www.ventureairsoft.ca

July 19th, 2011, 11:26	#7
Jimski Trader rating Join Date: Jun 2005 Location: Montreal	also you can check if there is a leak between the hop unit and inner barrel... __________________

July 19th, 2011, 20:10	#8
venture Trader rating Join Date: Jun 2005 Location: Halifax	Well I put my Marui hopup with Madbull tb barrel into the thing and it still shoots weak. I had thought the hopup/nozzle interface had tested well, but upon retesting the problem lies there. Airseal is terrible at the hopup/airseal nozzle. I replaced the nozzle and tried again. Exactly the same, massive air loss. Any ideas how to fix this problem? __________________ Visit us at :www.ventureairsoft.ca

July 19th, 2011, 20:19	#9
Urrah! Trader rating Join Date: Dec 2010 Location: Oil Park, Canuckistan	What is the barrel made of? __________________ In loving memory of Omeljan Kuzik.

July 19th, 2011, 20:29	#10
venture Trader rating Join Date: Jun 2005 Location: Halifax	The stock CA barrel is brass and the one from my TM is Madbull aluminum TB barrel. __________________ Visit us at :www.ventureairsoft.ca

July 19th, 2011, 20:33	#11
Urrah! Trader rating Join Date: Dec 2010 Location: Oil Park, Canuckistan	Are the barrels clean? Was real gun oil used by accident on any of the parts? Is there maybe an FPS reduction piece in the nozzle? __________________ In loving memory of Omeljan Kuzik.

July 19th, 2011, 20:40	#12
venture Trader rating Join Date: Jun 2005 Location: Halifax	None of the above. It is a case of the nozzle not reaching into the hopup enough or something like that. the air is blowing down the feed tube into the magazine. __________________ Visit us at :www.ventureairsoft.ca

July 19th, 2011, 20:52	#13
Urrah! Trader rating Join Date: Dec 2010 Location: Oil Park, Canuckistan	I'm sorry, but I cannot help you. __________________ In loving memory of Omeljan Kuzik.

July 19th, 2011, 21:07	#14
Eien Trader rating Join Date: Dec 2009 Location: Toronto, Ontario	Is your nozzle on the cylinder head or on the tappet plate? Sometimes, I accidently put the nozzle in the cylinder head and not on the tappet plate.

AUG shooting weak problem

Doctor's Corner