GSG 522SD Firing multiple rounds

[raiders]

I just bought a new SD rifle and the first time I had it to the range it shot fine except!  On more than one occasion it wold fire two rounds with one trigger pull.  I know that is not good but what could be causing it to happen?  The rifle is new and I didn't clean it before I took it to the range the first time.  I have since cleaned the rifle but have not had it back to the range.  Any help would be appreciated.  Thanks

[asmurff]

I'd give Ruger a call, they are generally very helpful.

[imschur]

If it is brand new call ATI. That kind of stuff can get you in trouble by accident

[lmao_37]

I'd give Ruger a call, they are generally very helpful.

ruger ?

[asmurff]

sorry momentary case of oldhiemzers.

[a|ex]

apply for your class III license...

or sell it for $10k

-a|ex

[rodent.22]

It could be a weak spring in your trigger group....

[raiders]

Here's an update.  I called the manufacture and they said the only time they heard of this happening was when something was caught in the firing pin IE carbon.  I told them this was the first time I had fired the weapon.  Since then I cleaned the rifle and had it back to the range with no malfunctions.  So I guess there was allot of grease or something making the firing pin malfunction.I will post back if it starts happening again.  I shot close to 500 rounds through it with no problems so I think the problem is fixed.  Thanks for the posts. >:D

[Longitude Zero]

Good to hear.  I have 2000+ rounds thru mine and have never had that happen to me.

[imschur]

Its fixed but he goes through 500 rounds in 250 pulls of the trigger. It has a built in double tap feature  :laugh:

[SCORPiON5150]

I just picked mine up today after waiting 10 days for the ridiculous California waiting period. I am disappointed to say mine is doing the exact same thing. It seemed to get progressively better throughout my session, but the first 10 or so mags I ran through it, it was firing 2 or sometimes 3 rounds in bursts just about once per 10 round mag. It happened a whole bunch of times throughout a 500 round session like 15-20 times I'd imagine (quit counting after 7 times). It seemed to quit doing it so bad after awhile, but had the occasional spurt of 2 rounds every 3 or 4 mags. Perhaps the weapon needs to be broken in and cleaned like the OP suspects? Disappointing to say the least, being the owner of a Colt / Walther / Umarex M4 .22LR as well which has been super reliable. Are we the only ones that have experienced this issue it seems?

[Kilibreaux]

Well...here's the answer everyone has been waiting for:

The "sear housing" spring tends to be relatively weak.  This is the small spring located in the front portion of the trigger housing.  At the same time the sear to hammer engagement is not optimized...by this I mean the hammer notch is bisected by a slot that leaves relatively small engagement surfaces on either side.  To add to the potential problem, the hammer notch is not precision cut and angled, and thus has rounded edges rather than sharp which simply add more to the potential for partial sear engagement.  The sear is also installed "as cast" without benefit of any truing of engagement surface, or honing to produce an engagement angle that cause the hammer notch and sear to pull into engagement with applied spring pressure.

During the firing cycle the trigger is pulled and this retracts a safety arm from beneath the sear housing, thus allowing the housing to rotate downward.  The hammer comes back and smacks the disconnector and this releases the sear housing to snap upward under sear housing spring force thus engaging the hammer notch.  Due to the additive impact of all mentioned variables, some GSG's may work fine, others will exhibit multiple firing every so often due to partial sear engagement that is easily dislodged during the bolt's cycle.

For me the cure was to add a second spring outside (around) the factory spring...basically I shortened a click pen spring to slightly longer than the space between sear housing and trigger housing opening and slide the two springs together, then inserted.  I reshaped and honed the hammer notch and the sear for a more "positive", higher surface area engagement with an angle that causes the two surfaces to slide "into" engagement with even modest spring pressure.  Took the modified GSG out and over 200 shots had zero multiple fires.  Before the mod I would usually get a multiple every 20 shots on average with the frequency increasing as the GSG warmed up.

[a|ex]

i may have to buy a number of these models before it gets discontinued or banned...

-a|ex

[a|ex]

we shouldn't be talking about this... i don't think the mods will approve.

-a|ex

[imschur]

we shouldn't be talking about this... i don't think the mods will approve.

-a|ex

correct..Thanks

[Kilibreaux]

Since my last post I have finally identified the real reason for GSG multiple fires.  The sear housing spring is relatively weak and fails to consistently snap the sear housing up with sufficient force to engage the hammer notch.  Additionally, the sear/hammer engagement angle is not ideal for inducing the sear and hammer notch to slide INTO engagement with minimal pressure.

The simplest solution is to take a "click pen" spring and shorten it to just longer than the space between the sear housing and trigger housing.  Insert the stock spring into it to create a "double coil" which will double the force exerted on the sear housing when the hammer impacts the disconnector and causes the sear housing to snap upward.  Even without reshaping the sear and hammer notch, doubling sear housing spring pressure should solve the multiple fire problem.

[mastercamper]

Well...here's the answer everyone has been waiting for:

The "sear housing" spring tends to be relatively weak.  This is the small spring located in the front portion of the trigger housing.  At the same time the sear to hammer engagement is not optimized...by this I mean the hammer notch is bisected by a slot that leaves relatively small engagement surfaces on either side.  To add to the potential problem, the hammer notch is not precision cut and angled, and thus has rounded edges rather than sharp which simply add more to the potential for partial sear engagement.  The sear is also installed "as cast" without benefit of any truing of engagement surface, or honing to produce an engagement angle that cause the hammer notch and sear to pull into engagement with applied spring pressure.

During the firing cycle the trigger is pulled and this retracts a safety arm from beneath the sear housing, thus allowing the housing to rotate downward.  The hammer comes back and smacks the disconnector and this releases the sear housing to snap upward under sear housing spring force thus engaging the hammer notch.  Due to the additive impact of all mentioned variables, some GSG's may work fine, others will exhibit multiple firing every so often due to partial sear engagement that is easily dislodged during the bolt's cycle.

For me the cure was to add a second spring outside (around) the factory spring...basically I shortened a click pen spring to slightly longer than the space between sear housing and trigger housing opening and slide the two springs together, then inserted.  I reshaped and honed the hammer notch and the sear for a more "positive", higher surface area engagement with an angle that causes the two surfaces to slide "into" engagement with even modest spring pressure.  Took the modified GSG out and over 200 shots had zero multiple fires.  Before the mod I would usually get a multiple every 20 shots on average with the frequency increasing as the GSG warmed up.

hey if you could post a video on youtube explaining what you did that would be much appreciated thanks.