WE PX4 hammer drops along with slide.

[Pistolguy]

Hello. I bought a brand new WE PX4. Almost every time after firing, the hammer drops along with the returning slide and a bit more rarely it kinda short strokes 2-3 times without chambering a bb. I took it back to the store, they replaced it with a new one. The new one has the same issues. Can anyone guess what the problem is? Thank you for your time.

EDIT: One more thing, it appears to lose power and spit gas rather quickly, at about 2 magazines.
EDIT 2: Another symptom I noticed is that sometimes when it jams and I try to remove the magazine, it's gas starts spilling out. The slide is in its normal position when that happens.

 

[ButcherBill]

What gas are you using?
Does the hammer lock back manually?

 

[Pistolguy]

What gas are you using?
Does the hammer lock back manually?

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I am using ProTech green gas, the same gas the store I bought it from uses to test them. And yes, the hammer locks back manually.

 

[ButcherBill]

Then my ignorant mind says not enough gas is going into the slide to recock it, dunno what the solution is but I would spend a good 5 mins racking the slide while you hold the trigger (mag out & holding the slide stop) to weaken the spring, it might simply be too strong/new to let the slide go back far enough.

 

[ButcherBill]

You could try a stronger gas to have the same effect

 

[Pistolguy]

I tried red gas, no noteworthy difference. Thanks for the suggestion anyways. One more thing, it appears to lose power and spit gas rather quickly, at about 2 magazines.

 

[ButcherBill]

Then try my first suggestion, someone might come along with a better idea tho

 

[Pistolguy]

Tried wearing out the ''newness'' as you suggested. No effect, the result is the same. Thanks again for the reply anyways.

 

[Cannonfodder]

Have you tried a different magazine?

 

[Pistolguy]

Have you tried a different magazine?

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Yes, three in fact.

 

[Cannonfodder]

Well that's that idea out the window. Have you tried striping it down, cleaning and regreasing everything?

 

[Pistolguy]

Well that's that idea out the window. Have you tried striping it down, cleaning and regreasing everything?

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Yes. I was wondering if it was a dry piston head, but apparently that was not it.

 

[Cannonfodder]

Well I'm afraid that's me out of suggestions then.

 

[Pistolguy]

Well I'm afraid that's me out of suggestions then.

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That's alright. I appreciate the effort.

 

[EvilMonkee]

Sorry but the WE PX4 is widely regarded as a hot piece of garbage, as you are finding out. The TM PX4 is excellent.

 

[EDcase]

Sorry but the WE PX4 is widely regarded as a hot piece of garbage, as you are finding out. The TM PX4 is excellent.

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Well aren't you the fountain of useful info

My WE PX4 Bulldog (Short) doesn't seem to behave the same. When it runs out of gas it just spits out a BB weakly and doesn't lock the hammer.