M9 GBBP Going "full auto"

enemybrit · May 9th, 2013, 19:27

Hi everyone.

I have a Jg M9 and recently put some upgrades in it including a 150% guarder spring set and a new guarder 'piston head'. Previous upgrades were an action army bearing spring guide and an action high flow valve. With the nee upgrades, the pistol shoots okay its first couple shots and all the sudden goes fully automatic. Sometimes it just goes full auto right on the first trigger pull on a new mag. With the stock recoil spring and trigger sping it shot without full auto problems. What could possibly be happening? The sears seem to be in good condition. On a side note thr gun has been sitting awhile before these nee upgrades. Thanks everyone.

Styrak · May 9th, 2013, 20:19

Swap the old parts back in, see if it still happens.
Simple elimination of possibilities.

enemybrit · May 9th, 2013, 20:20

Forgot to add i did and it worked as it should. The blowback on the old.trigger and recoil spring is to laugh at, as in very very light.

audi_bhoy · May 9th, 2013, 20:25

The new recoil spring is too strong and the slide doesn't go back enought to re-engage the trigger sear.

enemybrit · May 9th, 2013, 20:37

Quote:

Originally Posted by audi_bhoy

The new recoil spring is too strong and the slide doesn't go back enought to re-engage the trigger sear.

How can this be fixed?

audi_bhoy · May 9th, 2013, 20:46

Put a weaker recoil spring in, or maybe try to shoot while pushing the mag upward, sometimes there is a little space between the mag's rubber and the nozzle, and a certain amount of gas is venting instead of being transfered to the nozzle.

enemybrit · May 9th, 2013, 22:03

Could it possibly be that my trigger sear spring is not strong enough and the stronger recoil spring is pushing the slide forward so fast that the weak spring cannot catch on the trigger? The gun is 2 years old and has been sitting for awhile, maybe the spring isn't doing as well of a job as its supposed to.

EDIT: Maybe this is what I need....
http://www.airsoftparts.ca/store2/in...roducts_id=976

audi_bhoy · May 9th, 2013, 22:31

You can try that. Does it locks back on empty mag with the stronger recoil spring? If it doesn't, chances are the slide isn't going back enought. If it does lock on every empty mag, then it might be your sear as you stated.

enemybrit · May 9th, 2013, 22:41

when it is warm out (aka not in my basement) with the stronger recoil spring it locks back if it doesn't hiccup on and just do full auto. I am going to try and get that new spring set and see how it goes. I may end up needing a new sear kit, but I cannot seem to find the sear that latches onto the notches in the hammer. If any part of the trigger would be worn, it would probably be that part.
EDIT- This is part 46

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

May 9th, 2013, 19:27	#1
enemybrit Trader rating Join Date: Jan 2009 Location: Northern Ontario	M9 GBBP Going "full auto" Hi everyone. I have a Jg M9 and recently put some upgrades in it including a 150% guarder spring set and a new guarder 'piston head'. Previous upgrades were an action army bearing spring guide and an action high flow valve. With the nee upgrades, the pistol shoots okay its first couple shots and all the sudden goes fully automatic. Sometimes it just goes full auto right on the first trigger pull on a new mag. With the stock recoil spring and trigger sping it shot without full auto problems. What could possibly be happening? The sears seem to be in good condition. On a side note thr gun has been sitting awhile before these nee upgrades. Thanks everyone.

May 9th, 2013, 20:19	#2
Styrak Trader rating Join Date: Jan 2007 Location: Saskatoon, SK	Swap the old parts back in, see if it still happens. Simple elimination of possibilities. __________________ Airsoft Sales and Repair/Upgrade Services

May 9th, 2013, 22:03	#7
enemybrit Trader rating Join Date: Jan 2009 Location: Northern Ontario	Could it possibly be that my trigger sear spring is not strong enough and the stronger recoil spring is pushing the slide forward so fast that the weak spring cannot catch on the trigger? The gun is 2 years old and has been sitting for awhile, maybe the spring isn't doing as well of a job as its supposed to. EDIT: Maybe this is what I need.... http://www.airsoftparts.ca/store2/in...roducts_id=976 Last edited by enemybrit; May 9th, 2013 at 22:07..

May 9th, 2013, 20:20	#3
enemybrit Trader rating Join Date: Jan 2009 Location: Northern Ontario	Forgot to add i did and it worked as it should. The blowback on the old.trigger and recoil spring is to laugh at, as in very very light.

May 9th, 2013, 20:25	#4
audi_bhoy Trader rating Join Date: Mar 2009 Location: Trois-Rivières	The new recoil spring is too strong and the slide doesn't go back enought to re-engage the trigger sear.

May 9th, 2013, 20:46	#6
audi_bhoy Trader rating Join Date: Mar 2009 Location: Trois-Rivières	Put a weaker recoil spring in, or maybe try to shoot while pushing the mag upward, sometimes there is a little space between the mag's rubber and the nozzle, and a certain amount of gas is venting instead of being transfered to the nozzle.

May 9th, 2013, 22:31	#8
audi_bhoy Trader rating Join Date: Mar 2009 Location: Trois-Rivières	You can try that. Does it locks back on empty mag with the stronger recoil spring? If it doesn't, chances are the slide isn't going back enought. If it does lock on every empty mag, then it might be your sear as you stated.

May 9th, 2013, 22:41	#9
enemybrit Trader rating Join Date: Jan 2009 Location: Northern Ontario	when it is warm out (aka not in my basement) with the stronger recoil spring it locks back if it doesn't hiccup on and just do full auto. I am going to try and get that new spring set and see how it goes. I may end up needing a new sear kit, but I cannot seem to find the sear that latches onto the notches in the hammer. If any part of the trigger would be worn, it would probably be that part. EDIT- This is part 46 Last edited by enemybrit; May 9th, 2013 at 22:44..

M9 GBBP Going "full auto"

Doctor's Corner