Having a problem with my Grease Gun lower on the Uzi it fires two or more shots like

[arch stanton]

Having a problem with my Grease Gun lower on the Uzi it fires two or more shots like it is in Full Auto when the selector is in semi auto. Has anyone else had a probelm with this. The lower came from Vector. Also the trigger will lock out meaning it is not engauged the problem seems to be in the selector switch positioning.

Later Joe:silly

 

[firefighter]

Could it be that the sear is binding in the sear holes of the receiver?
When you pull the trigger and the sear pulls down... if it stuck down, wouldn't it cause a runaway until the sear came back up?
Remove the topcover and bolt and see if the sear is moving freely in the square holes.
If the striker is not recatching on the sear after the bolt comes back, you could get multiple rounds firing.
I may be way off course here, but it sounds like it's possible..... especially if you hadn't had the problem before.

Edit.... I re-read the post. Is this a F/A gun?

 

[arch stanton]

Yes it is a FA This is the first serious run with all the mags loaded and it burnt off two rounds each time in semi auto:bang

 

[Cortland]

My Vector GG lower will often fire bursts when in semi. It doesn't bother me -- in fact, that's sort of the reason I spent so much money for a FA.

 

[dmsdog]

My Vector GG lower also doubles in semi.

 

[TulsaGunGuy]

I have a Chris Humphries (sp) and it does the same thing.

 

[arch stanton]

Has anyone tried to remedy the problem. Mine is going back to Vector today.

Later Joe

 

[buckaroo1236]

MY CHRIS HUMPREYS DOES THE SAME THING AS WELL.

 

[tacdrivrnc]

add a "stop dog" disconnector

I've have heard that some of these kits don't have the stop dog disconnector thingy attached to the sear pin to prevent more than one shot in single fire mode. Adding one may solve the problem.

 

[JIMBO]

My Vector GG lower will often fire bursts when in semi. It doesn't bother me -- in fact, that's sort of the reason I spent so much money for a FA.

That could become a safety issue with a range master if you happened to be shooting at a "semi only" location such as a range, wouldn't it ? Not to mention, a safety issue anyway ? Vector would probably like to correct it for you or maybe suggest to you how to do it. Best Regards

 

[Cortland]

That could become a safety issue with a range master if you happened to be shooting at a "semi only" location such as a range, wouldn't it ?

Shooting full auto at a "semi-auto only" range is never a safety issue. It might be a rules issue, but it most definitely has nothing to do with safety or lack thereof. Ranges with full-auto prohibitions have them for political reasons, not for "safety."

 

[watchin]

It is a safety issue. Anytime a weapon discharges a round that you don't intend to fire it becomes unsafe.
-watchin

 

[Cortland]

We're talking about doubles, not runaways. I know the gun doubles. So no safety issue. Conceptually it's no different than firing a full-auto with an ROF too fast to pull singles.

 

[RoverDave]

If you don't know what's causing he doubles, then you don't know if the problem could lead to a runaway.

 

[Cortland]

Well that is true. Although I've been shooting it as-is for some time with no problems, and I presume none of other posters who have experience doubles have had any trouble with run aways? But I think my point still stands that "semi-auto only" ranges are bullshit and have nothing to do with safety.

 

[arch stanton]

Well my lower is on its way back to Vector. I just cant understand why you would accept it firing doubles in semi auto. If it does not work 100% then it is not worth having.

Later Joe

 

[Cortland]

I accept it because my Uzi's selector very, very rarely leaves the 'A' position. Nonetheless, I would be interested to hear what Vector determines as the cause.

 

[Oswald2001]

If the 9mm semi setting gives only one shot, so should the .45.

Something is wrong, IMO.

I would have it fixed just because it isn't right.

I think the concern about runaways is valid.





Of course, if it doesn't matter to you....leave it.

 

[arch stanton]

I received my GG lower back from Vector today I will get to try it out on Sunday. It seems much tighter when you move the selector switch.

Later Joe

 

[arch stanton]

Well I tried the GG lower out tonight and it double fired again but it seems to be mag specific maybe not quite sure yet. It malfunctions I believe when I use the GG mag with the less of a severe angled follower. A few of my mags have different followers. Can the height of the mag effect getting doubles when its in the magwell ?

Later Joe I will call Vector tomorrow