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OLD PMI Pirahna won't shoot


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#1 Jesse1234

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Posted 27 June 2011 - 11:35 AM

I finally found my old pirahna. I put a CO2 tank in it and when i try to shoot it, it doesnt cock back. I opened up and oiled and lubed the parts and it still doesnt want to cock back after each shot, i tried high pressure HPA and it did nothing. There is a screw on the back which might bt he velocity adjuster but that doesnt help.

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#2 Danny D

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Posted 27 June 2011 - 11:49 AM

You need to lube or potentially replace the stryker *hammer) o-ring.

#3 Jesse1234

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Posted 27 June 2011 - 12:00 PM

the stryker being the inside metal piece underneath the bolt?
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#4 Danny D

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Posted 27 June 2011 - 12:56 PM

Its made out of metal, yes, and to get to it you need to take the velocity adjuster and spring off. It is in the bottom tube and is a cylindrical metal peice with some weight on it. It will have an o-ring on the front of it.


Check for damage + dirt. Clean it.. Lube, try it out. If it still doesnt work with lubricant, you will need to replace it with an 015/70 o-ring. When you put it back in, make sure you take the grip frame off so the sear doesnt damage the oring. Put the grip frame back on afterwards. Some pirhanas have a sear drop latch to prevent this, but im not sure if your model has it, so just take off the gripframe when putting the hammer back in.

Edited by Danny D, 27 June 2011 - 01:16 PM.


#5 Jesse1234

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Posted 27 June 2011 - 01:11 PM

ok i will try that thanks
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#6 KCMECustoms

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Posted 23 October 2011 - 09:48 PM

If that fails then it is possible that the lower tube is worn out which is common with stbb guns. The only way to fix that is to file the side of the valve stem down a bit to get better blowback.




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