GTA
All Springer/NP/PCP Air Gun Discussion General => European/Asian Air Gun Gates => China/Asian AirGun Gate => Topic started by: Rob in NC on January 13, 2014, 11:18:50 AM
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Is it just me or is the QB 7X breech just a mystery? I have tuned all manner of springers... I have tuned PCP's, I have built various conversions from CO2 to PCP/HPA.
I've worked on no less than a dozen QB7x guns converting to HPA or PCP and each and every time, I have trouble getting the breech on and working correctly. My latest project has me converting a QB78 Carbine to HPA. I used a tank block and a 79 tube. Did some light valve mods... not looking for a lot of velocity here, just wanted a project. Got her dressed in a nice laminate stock....but.... yet again, the breech is giving me fits.
I put it together and pull back... push forward ...and am 'rewarded' with just a muffled little 'click'... no 'snap'... This happens each time I work on one of these guns. Eventually, I always get it, but by then I've tried every possible configuration I can think of and never know what I did to 'fix' it.
Anyone else have this issue?
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You have the cocking pins in the wrong place in the bolt.... at least that would be my guess.... Next time you take a NEW one apart, pay attention to where they go....
Bob
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You have the cocking pins in the wrong place in the bolt.... at least that would be my guess.... Next time you take a NEW one apart, pay attention to where they go....
Bob
and that makes sense... but I've tried every configuration I could think of...haha... If I dont get it by the weekend, I'll just bust open another one and see. One would think that after doing a dozen of these that a 'smart' person WOULD have paid attention when he took the breech off..... ah well.