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Ls Spring Replacement Big Problem

gun stays cocked for 5 seconds then shoots

17 replies to this topic

#1 Arcanum

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Posted 03 September 2006 - 09:05 PM

I added a bbb spring (cut down) to my ls, did the restrictor removal, and left the ls spring in there. Now it hits 100' pretty consistently but the problem is that it shoots on its own because the spring is too powerful for the plastic catch at the back of the gun.

Does anyone know how to reinforce it or make it stay without me having to take out a spring?
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#2 SPU-Nerf

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Posted 03 September 2006 - 11:56 PM

You need to open up the gun and check for a orange tab that is in the middle of the spring power unit and it is to the bottom of the unit, if the orange tab is popped out of its screw/washer then unscrew the screw and push the tab under the washer and rescrew back on. If this doesn't fix your problem, then you didn't cut enough off of the BBB spring.
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#3 Lancaster

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Posted 04 September 2006 - 02:19 PM

I'm having a similar problem. Could you possibly point this piece out to me with this picture?
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#4 SPU-Nerf

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Posted 04 September 2006 - 05:10 PM

pic removed,
not the answer to the problem
see below for answer

Edited by SPU-Nerf, 05 September 2006 - 12:09 AM.

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#5 CaptainSlug

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Posted 04 September 2006 - 09:26 PM

The piece you just circled locks the bolt in forward position and after the plunger has been primed.
It doesn't affect your ability to pull the trigger. The piece that prevents you from being able to pull the trigger is infront of the trigger and that fits into a slot in the bolt carrier only when the bolt is in the forward position.

The only reason the gun would fire itself is that the spring tension is too high for the trigger plate to hold and is deforming enough to release the plunger. You'll have to reinforce the trigger plate with some sheet aluminum or something.

I knew this was going to be a potential problem for many people. The trigger plate is far too weak to hold the kind of load forces you guys are adding with a second spring. I've already considered making a new trigger plate out of sheet aluminum or polycarbonate.

Edited by CaptainSlug, 04 September 2006 - 09:34 PM.

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#6 General Cole

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Posted 04 September 2006 - 09:40 PM

Posted Image
Check that, the spring might be missing or it might be offset. Also check the cocking indicator and see if that is still in place and working. That might also be it because it affects the plunger lock. Now ya owe me 25 cents. ;) Blue Cricle
We should stop calling out/making fun of/pissing GC off. He's actually contributed and is available for trade. He's a better than average member no doubt. Got your back Cole.
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You know what... I know it's kinda late... but Props Cole.
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#7 CaptainSlug

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Posted 04 September 2006 - 10:27 PM

The priming indicator doesn't affect anything else.
I went ahead and labeled everything and made notations describing what the smaller parts do.
Posted Image
Bigger
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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?

#8 SPU-Nerf

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Posted 05 September 2006 - 04:53 PM

Well I am dumb, I totally forgot what I did on my gun to fix this problem, but since it was so quick and easy I could see why I forgot.
Just add another spring (like one from a pen) to the trigger plate; after all it has two posts.
Sure it makes the indicator not work but it helps in pushing down the trigger plate.
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#9 sam

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Posted 05 September 2006 - 05:05 PM

Wait, so is the prime indicator necessary?

Edited by sam, 05 September 2006 - 07:21 PM.

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#10 SPU-Nerf

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Posted 05 September 2006 - 05:28 PM

No I took mine totally out and it works great.
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#11 General Cole

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Posted 05 September 2006 - 06:25 PM

I dont even know how it wouldnt cock in the first place. I have a full BBB spring and I have never had that problem. Hard to cock, granted, but not staying cocked that is ridiculous. Yes the priming indicator helps to have in, I don't know why it just does.
We should stop calling out/making fun of/pissing GC off. He's actually contributed and is available for trade. He's a better than average member no doubt. Got your back Cole.
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You know what... I know it's kinda late... but Props Cole.
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#12 elf avec gun

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Posted 05 September 2006 - 07:47 PM

I added a BBB spring to mine aswell I have no problems of it missfireing like yours but when ever I cocked it origially the stock would give out and slam forward I fixed this with two metal rods. :blink: .
But if anyones catch thingy is wearing down just cut a small peice of tin, or aluminum and put it over you catch.
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#13 CaptainSlug

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Posted 06 September 2006 - 07:07 PM

I replaced the trigger plate spring with a much heavier gauge spring of equal length and the infrequent self-firing went away. I had to use an X-acto knife trim away a little bit of plastic around where the stock spring goes in order for the replacement spring to fit.
The trigger feels much better and the gun feels much more solid even though it's using two springs on the plunger.

Edited by CaptainSlug, 06 September 2006 - 07:08 PM.

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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?

#14 Lancaster

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Posted 06 September 2006 - 07:10 PM

I'm not sure what I did, but for some reason the bolt no longer lines up with the magazine and chamber of the gun. I can't tell why, but the clip will not fit in the gun, I don't know if this could in any way be because of the strange size of the spring I put in, or maybe my jamming in the clip bent something. :ph34r:
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#15 CaptainSlug

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Posted 06 September 2006 - 09:05 PM

If you use a spring that won't compress far enough the bolt will get in the way of the magazine sometimes. I shaved a little bit off of the rear of the lip on my magazines to alleviate this a bit.

Edited by CaptainSlug, 06 September 2006 - 09:06 PM.

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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?

#16 Uncle Hammer

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Posted 06 September 2006 - 10:12 PM

OMC has reported that repalcing the spring all together with a stretched MS spring works. It gives him a fair amount of power and it doesn't have as much force as two springs. He said he hasn't had any catch problems.
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#17 Arcanum

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Posted 07 September 2006 - 03:09 PM

Bah, it turns out I just didn't turn the screws underneath the stock enough and the back of the gun was too loose to hold the pressure of the spring.

All I did was tighten all the rear screws and now its working fine again.
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#18 CaptainSlug

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Posted 08 September 2006 - 09:45 PM

Here's what I did to stiffen the trigger plate. I replaced the stock spring...
Posted Image
and cut away the truss pieces a little bit to allow the new spring to fit.
Posted Image
The trigger is a little bit stiffer, but the plunger stays firmly locked in the primed position now and I haven't had any mis-fires since.
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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?


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