Mp7 Problem With Bolt Sticking/stopping?
Posted 19 April 2012 - 06:46 PM
I've installed the dangerwerx low power valve and, before today, it was working flawlessly.
While I was shooting it a few minutes ago it started acting up. I would fire one bb on semi auto, and then the bolt would lock as if there were no bb's in the magazine, yet it would be full. After this happened for a few minutes, the bolt started stopping halfway, so the bolt door is half open/closed, and neither the bolt catch nor the charging handle could move it.
I'm completely baffled as to what may be the problem. Any input would be appreciated!
Posted 19 April 2012 - 06:52 PM
Welcome to the forums Mistrael!
Posted 19 April 2012 - 07:08 PM
I will order some ksc/kwa bb's as soon as I can, but my first game was going to be saturday, so this is a bit of a kick in the pants.
I opened it up just a few minutes ago and discovered one of the springs that connect the bolt and the gas movey thing (no idea what that's called) has broken. It is one of the 2 extension springs inside the bolt. Would I be able to find a replacement at a hardware store, or would I need to order one?
Posted 19 April 2012 - 07:23 PM
These springs hold the gas nozzle to the breach and pulls the gas nozzle back so it doesn't get in the way during firing. You noticed the bolt may stop mid-cycle, actually its the gas nozzle not being returned back by those springs that make it jam mid cycle. Buying those two springs and replacing your current ones will solve your issue.
Once again, welcome to the forums!
Edit: since you have diagnosed the problem as that, and said the we bbs you've used are fine, maybe you don't need the kwa/ksc bbs, but buy them anyway just to see how good they are and if they change your performance.
Edited by Outlaw1995, 19 April 2012 - 07:24 PM.
Posted 19 April 2012 - 07:32 PM
Posted 19 April 2012 - 07:35 PM
Evike has a whole drop in assembly for 35 bucks, so I think I'll just get that.
Posted 19 April 2012 - 07:40 PM
Posted 20 April 2012 - 01:05 PM
Posted 20 April 2012 - 08:31 PM
Posted 21 April 2012 - 08:35 AM
Posted 21 April 2012 - 05:52 PM
Posted 21 April 2012 - 07:15 PM
Posted 25 April 2012 - 04:00 PM
Thanks for your help!
Posted 25 April 2012 - 06:09 PM
Thanks for your help!
Posted 30 April 2012 - 12:19 PM
Also, the problem with the slide locking back still persists, and I am using kwa's own .25 bb's (Note that I have removed both extensions springs). I will fire one shot with a fully gassed and loaded mag and it will fire, then lock the slide back. I'm becoming quite impatient with kwa products.
Edited by Mistrael, 30 April 2012 - 12:22 PM.
Posted 30 April 2012 - 01:58 PM
Posted 30 April 2012 - 02:01 PM
Posted 30 April 2012 - 02:18 PM
Does anyone have any ideas as to what is causing the bolt to lock back whenever I fire even a single shot from a full mag? It happens regardless of full or semi auto.
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