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#1 BENboBEN

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Posted 19 October 2012 - 08:04 PM

Alright, I'm going to finally be buying myself an MP7 and need to know if there are any caveats or things I shouldn't do to it. I'm not talking about no spray silicone, or no dry firing, or bucking swelling, or regular cleaning, or any general maintenance. I know a lot about maintenance. I'm talking about stuff specific to the gun to avoid, such as not putting the mag in with a closed bolt on the M11, tripping the hammer on the M1911 without a mag in the gun, and changing the fire mode on a M18c without locking the slide back.

#2 gcw360

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Posted 19 October 2012 - 08:20 PM

View PostBENboBEN, on 19 October 2012 - 08:04 PM, said:

Alright, I'm going to finally be buying myself an MP7 and need to know if there are any caveats or things I shouldn't do to it. I'm not talking about no spray silicone, or no dry firing, or bucking swelling, or regular cleaning, or any general maintenance. I know a lot about maintenance. I'm talking about stuff specific to the gun to avoid, such as not putting the mag in with a closed bolt on the M11, tripping the hammer on the M1911 without a mag in the gun, and changing the fire mode on a M18c without locking the slide back.
Nope.  At least none of the three things you mentioned.  The mag can be inserted with the bolt closed....though I tend not to do this out of habit. Dry firing will not dislodge the firing pin...it's not set up like the MK series, and and fire selection is not like the M18C so no worries there.  You have already mentioned the main things to be aware of with spray silicone, bucking swelling....etc. The only thing I will point out is that it shoots HOT!  But to me...that's a good thing and you can always purchase a low power/CQB bolt to mitigate that.  The main thing that I have seen issues with is that people tend to release the mag BB follower without any BB's in the mag which will ruin the follower....But that's about it from the experience I have had with mine.

IMO, it's one of the more stable and easier guns to maintain in the KWA line-up.  I will add that if you decide to work on the internals...well...be ready for a challenge.  It's not that easy apart from the bolt swap.  But there are videos to help with that.  I would consider an after market TBB if you can find a good one like the EdGI 6,03.  It's a very good barrel that will give you a boost in performance/accuracy and FPS.  For instance, mine is firing 465 FPS with .2's with that barrel and some tweaking to the bolt.  That may be too hot for most fields but I like it!!!

#3 BENboBEN

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Posted 19 October 2012 - 10:49 PM

Alright thanks, I love to work on my guns and break them into as many pieces as i can just to see how they work and I love a challenge. I'm weird. Also, I think I heard something about releasing the bolt with an empty mag can damage something. Someone wanna chime in?

#4 Outlaw1995

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Posted 20 October 2012 - 06:32 AM

You must be thinking about the LM4. It's not wise to close the bolt on an empty mag in the LM4 because there is no notch that pushes the bb follower down when you do release your bolt. When you release your bolt on a pistol or smg such as the MP7, the slide catch pushes down on that little notch on the bb follower, pushing it down, so the loading arm connected to the nozzle won't hit into anything such as your bb follower. This is a slight issue on the LM4, as there is no notch on the bb follower that engages with the slide stop, (instead there's a two piece system that works in conjunction to the bb follower and bolt lock) so when the bolt is released on an empty mag, the loading arm will knock into the bb follower.

So just clarifying, it's fine to close your bolt on an empty mag on your MP7! :)

#5 akiraspeedstar

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Posted 20 October 2012 - 06:40 AM

Be careful when removing the flash hider (if you do), torquing it without loosening the adhesive first via heat will result in possible damage to the outer barrel or the piece that holds the outer barrel in place.

#6 BENboBEN

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Posted 20 October 2012 - 08:55 AM

Thanks, you guys are awesome. I'm not too excited about the flash hider, but it can't be as bad as the LM4's delta ring.

#7 Chuck S

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Posted 21 October 2012 - 04:07 AM

No wonder guys get confused.

Why do you guys keep saying the LM4 "delta ring" (handguard ring) -- part number 112 -- is a problem? It's a spring loaded retaining ring that just pushes back like it does on any M4.

The barrel nut -- part number 113 -- which is revealed under the delta ring once the handguards are off is the bugger that's hard to remove!  It has thread locker on it.

-- Chuck

#8 BENboBEN

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Posted 21 October 2012 - 04:19 PM

Thats what i meant. Delta ring assembly

#9 Captaincrazy

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Posted 25 November 2012 - 07:31 PM

yea im new to kwa guns, i just ordered an mp7 should be here in a few days, and i have some questions myself like how much does the extended mag ACTUALLY hold? some say 48, 40, even 50, but what is it really? also gas capacity? i know i bought a good gun but anything extra that i should lub or anything like that?

#10 Chuck S

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Posted 25 November 2012 - 07:52 PM

The MP7 magazine holds 40 BBs and quite a lot of gas if you're patient and fill for 40 seconds.  MV is over 420 fps so there's a bit of gas use.

There is also an optional short 20 round magaine which used to be standard.

-- Chuck

#11 Outlaw1995

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Posted 25 November 2012 - 07:54 PM

The MP7 magazine holds 40 rounds, while the short magazine holds 20. Retailers and airsofters confuse the numbers with other guns' magazines, like the MP9 magazine, which holds 48, the M11a1 magazine, which holds 50, and the extended M93r/ M9 magazine which holds 48.

Gas capacity depends on temperature. The warmer it is (say mid 80 degrees farenheit) the gun will perform optimally. If it is extremely hot, (say 90 degrees or hotter) gas would over-expand/over-pressurize, and efficiency would go down, likewise if it was cold... I'm sure you know how gas guns work. :)




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