[slayerfanx55]

I've had it for about a year, but I've only put about 400 rounds through it, if that many.
Is it worn out? What could it be?

 

[woogie]

The sear looks ok..... what does the piston look like?

 

[mroverkill]

Could be the trigger sear return spring. Check for a return spring on the bottom side of the mechanism.

 

[slayerfanx55]

Now that I see it, it look like is has some mold or something on the inside. Look at the picture with flash, that's not lube.

Edit: The return spring is there.

 

[Cheese Man]

I need macro pictures of the end of the piston, the part that catches the sear, from the side.

 

[fuzzywolly]

Make sure the screws that go into the receiver (through the trigger box) are tight.

 

[slayerfanx55]

If I tighten them all the way, it doesn't fit.

 

[Cheese Man]

Huh? What doesn't fit?

 

[rcnsasquatch]

I think he's referring to fuzzy's post about the bolts going through the trigger box into the receiver.

Sent from my HTC_Amaze_4G using Tapatalk

 

[newbie]

man you have a zero trigger and a stock piston? might try upgrading the top end and the magical sniper fairies will make everything work right

 

[wesley810]

^^That's kinda what took me by surprise. Usually people can't wait to upgrade everything up top and then just try to get away with better sears in the bottom. You already have the most expensive thing; I'd get some new cylinder parts.

 

[whisper]

Make sure that return spring hasn't lost its shape. Sometimes it can get bent out of shape.

 

[slayerfanx55]

Huh? What doesn't fit?

If I tighten those screws all the way, the spring guide stopper doesn't go in the hole for it at the bottom of the gun in front of the trigger guard.

^^That's kinda what took me by surprise. Usually people can't wait to upgrade everything up top and then just try to get away with better sears in the bottom. You already have the most expensive thing; I'd get some new cylinder parts.

I was considering getting everything before the zero trigger, but it keeps rising in price, and never in stock domestically. Ordering from hon kong and japan is a pain in the ass. So I quickly bought that. Almost everything else is easily found domestically. Besides making $220 is a lot harder than making $50
for a piston and such.

Make sure that return spring hasn't lost its shape. Sometimes it can get bent out of shape.

I checked the spring it's fine.

Also, it's not slam firing anymore. But then sometimes it does randomly...

 

[wesley810]

Is the end of the piston in good shape? It's hard to tell from the pics, but that's really the only thing that I could think of unless it's something in the trigger. It shouldn't be the trigger though since you said it only does it sometimes.

 

[SilentScope]

Chances are you fixed your problem temporarily (and unintentionally) by removing the piston for the picture, and then turning the piston before placing it back into the cylinder.

The end portion of the piston which catches onto the piston sear (I call it the piston catch) was probably worn out. By turning the piston, your sears are now using a fresher piston catch area which has been unused and not worn out.

The random slam-firing is still caused by the piston catch ring not being uniformly round anymore. If it begins to bug you, a new piston should fix the problem given the detail you provided.

 

[slayerfanx55]

Chances are you fixed your problem temporarily (and unintentionally) by removing the piston for the picture, and then turning the piston before placing it back into the cylinder.

The end portion of the piston which catches onto the piston sear (I call it the piston catch) was probably worn out. By turning the piston, your sears are now using a fresher piston catch area which has been unused and not worn out.

The random slam-firing is still caused by the piston catch ring not being uniformly round anymore. If it begins to bug you, a new piston should fix the problem given the detail you provided.

Alright thanks. I'll get a new piston ASAP.

 

[Unforgiving Apple]

If it still slam fires maybe the firing pin is not in all the way or messed up...

 

[mroverkill]

Another thing that might be related to the return spring, even if you checked it visually, it may have softened out. Also, the actual sear "shuttle" inside may have something obstructing its pivot travel.

 

[leonvx671]

I find it helps the return if you polished the 2 sears that control the sensitivity of the trigger. So that when you start to pull the trigger...there's no friction and also the return would have less friction as well

 

[hoggie]

Have you checked the springs inside of it? I had this issue arise.

-Hoggie