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MP7 charging handle/mag issue


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#1 bkdude7

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Posted 09 January 2013 - 09:53 AM

I AM THE FNG, excuse any derp

I bought the KWA MP7 around a month ago, and have now skirmished it twice in poor/cold conditions. Both times I had the same problem.

If i'm in my house, i pull the charging handle back, and let it forward, there is very little resistance.

If i put a mag in the gun, and charge the gun, it isn't as big of a "clank" as there is without the mag

If it is cold out, or sometimes in room temperature, the bolt seems to have too much friction to go forward, like it is not heavy enough.

THE PROBLEM IS
The bolt doesn't go all the way forward half the time (3mm), esspecialy in the cold. It picks up a round 100% of the time, but doesn't engage the gas valve or something on the mag, so if i fire, the trigger just clicks. I am using green gas. My other 2 friends with new mp7's do not have this problem. I guess im the odd one out. The bolt seems to be lubed fine, i don't know what to do. It's like the grease is almost cold and not sliding properly, help is much appreciated.

#2 Outlaw1995

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Posted 09 January 2013 - 01:53 PM

Hi Bkdude, welcome to the forums.

I've experienced the same thing with my MP7. What I found is that when you drop the bolt softly, the gun will not fire! I have not been able to understand why. But when I racked the bolt forcefully (like a badass), the bolt would go forward and the gun would fire just fine.

Put a little oomph into pulling the charging handle back. It will make you feel like a hardcore badass, but also will increase the likelihood that your gun will fire.

#3 Chuck S

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Posted 09 January 2013 - 03:47 PM

Be sure to not ride the charging handle forward.  Pull it to the full extent of travel and release.  Many folks have this same problem with real pistols.  Maybe they're afraid they'll hurt them.

We teach the "smack your shoulder with your hand" technique.  Pull back on the charging handle (or slide) hard enough that when it reaches the end of travel your hand is ripped off the handle and smacks your shoulder.  Push-pull.  Push the gun - pull the handle/slide.  Exaggerated for sure but works.

Also wipe any excess lubricant off the bolt.  Cold weather thickens oil and will affect operation.

-- Chuck

#4 kwaispro727

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Posted 10 January 2013 - 08:14 PM

Like everyone else said don't be afraid to exert a little force on it.  I know it's not a real gun so you may not have a ton of confidence in it, but the only thing that could really break (charging handle) is easily replaced and probably not expensive.  You actually may be more likely to damage your gun "under-charging" than "over-charging" it.

#5 bkdude7

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Posted 11 January 2013 - 09:40 AM

Wipe off excess lube, and rack the charging handle like a badass. Got it. Anything else guys?

#6 Outlaw1995

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Posted 11 January 2013 - 09:19 PM

View Postbkdude7, on 11 January 2013 - 09:40 AM, said:

Wipe off excess lube, and rack the charging handle like a badass. Got it. Anything else guys?
Be sure to be a badass while racking the charging handle like a badass. :D

#7 tehspiah

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Posted 25 January 2013 - 12:55 PM

I would disassemble the gun, and relube the bolt using a thinner lube, the only downside to that is that you need to lubricate it more often.




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