Installing G&G Knock Arm & Plunger Set for Tanaka M700

Picture intensive step-by-step upgrade guides.

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Installing G&G Knock Arm & Plunger Set for Tanaka M700

Post by Elvis » Fri Aug 19, 2005 4:37 pm

This article owes its origin to the lack of Tanaka M700 information out there and my quest for an accurate sniper rifle with a minimum effect range of 200 feet. I purchased a M700 Police back in January from friend Chris at Olympus Airsoft. I also purchased about 5 different weight BB?s from various manufactures. The gun was accurate to about 50 feet then I was getting inconsistent results. It had a left curve similar to a golf hook. It also was inconsistent in the hop up setting. The first thing I bought was a KM 6.04 tightbore barrel. I didn?t seem to make much difference. I also notice that when I took it apart that the forward barrel to receiver mount (part 91) was cracked. I had read of other incidents of that happening. I then called around in search of a metal hop up (really part 91 the forward mount, as the hop up is already metal. I found out the one on the M24 is metal! How frustrating that was, I emailed G&G to see if one was available. Yes, I got the auto reply assuring me of an answer in 24 to 48 hours. HaHa no such answer not even with follow up email. I was also in contact with Shawn at Airsoft Extreme. He is one of the few I have found in the USA with M700 experience. I was surprise to find he had a G&G Power Bolt in stock. Well, I ordered it. Who cares if it doesn?t shoot straight it least it will shoot harder LOL. I will write how to install the upgrade in a later review. So I find myself overseas and I am able to nose around in all these stores. I find a small company in Taiwan that makes a metal part 91. WOW have I struck it rich. I also find that this company makes a redesigned hop up assembly. This redesigned assemble has you cut a oval (they include a jig) in you barrel and give you a new bucking and a longer nozzle. I will review and give out the details in my next article. The longer nozzle is the key as it pushes the BB right up to the bucking. I couldn?t be happy about the results. The gun is very consistent and I have kills at 300 feet. The other parts I brought back are the G&G Power Pack, Knock Arm & Plunger Set, Gas Route Connecter Spring all for Tanaka M700 / M24. I wouldn?t have needed the Power Pack except for the Power Bolt nozzle is machined and not removable, so I purchase another stock PCS bolt and put the G&G steel cocking piece and striker spring in it. The funny part is the G&G store owner told me the Knock Arm and Plunger are just for durability. I asked him because you can never find information on what the different modification parts are for. Well as you can see it adds about 50 FPS.

Magazine Upgrade

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Take your magazine and put it on a clean surface.

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Assemble your tools. You need silicon oil, awl, needle file, small hammer, pin punch, eedle nose pliers, Phillips screwdriver.

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Discharge the remaining gas by depressing the gas valve lever. Be careful to point the gas opening in a safe direction.

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Remove the pin holding the gas valve lever then remove the lever. (These parts will not be used)

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Remove the 4 phillips screws holding the back on.

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Once that is done use a small slotted screwdriver to work the back off carefully.

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Inspect the magazine well and o-ring.

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Remove the C-Clip

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Slide the operating rod out from the magazine cover.

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Then using you pin punch carefully pry out the small oring.

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Get your new parts out.

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Disassemble the new operating rod.

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Test Fit the valve head in the Magazine.

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Clean up and file the opening smooth so the new valve operates smoothly.

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Clean and lubricate with silicon oil then insert the new valve.

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Then install the oring and carefully seat it into the magazine cover.

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Now put the spring on and screw the other half of the operating rod on.

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Next insert the awl into the hole in the Operating Rod head and tighten the other end with a screwdriver.

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Now lay out the assemble and line up the new knocker elbow in the same position.

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Remove the C-Clip and slip off the old knocker and install the new one.

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Hold the magazine upside down and slide it together. Don?t force it, it should pop right together.

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Now test the magazine by depressing the operating rod, look for the valve to open and close.

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Now replace the Gas Connector Spring by removing the BB Tube.

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This is whats left.

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Swap in the new spring under the gas connector.

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This is the Gas Valve.

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Reinstall the BB Tube.

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This is are your old parts. Yes, you actually have extra parts left.

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Your done now for the results.

My observations are that for some reason the first shot is always higher . I think it got to do with it initial flash to gas of the first shot effects the rest of the gas. I will run a review next on that new hop up design.

Ed

Lizotte@tampabay.rr.com

The parts shown here today are in stock at Olympus Airsoft

Ask for Chris
Last edited by Elvis on Tue Aug 23, 2005 4:57 pm, edited 3 times in total.
Elvis
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Post by Revelation » Fri Aug 19, 2005 4:41 pm

Yo Elvis,

You may want to check the post to see if,

"Disable BBCode in this post" is off. Pictures arnt being posted, but nice article though.
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Who knows....

Tappedops

Post by Tappedops » Sun Jan 01, 2006 11:31 pm

Elvis,

Just saying hi from AR snipers pearch, baited breath for your next update...if i can stand another one---you see were all just alittle bummed these mods are not already on our rifles...can you hook us up...links, dealers, well take anything...

Thanks Again

Tappedops

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Guges Mk3
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Post by Guges Mk3 » Mon Jan 02, 2006 9:05 am

Yeah ya slackers...fix the images....
I rather use a "nightmare" that shoots like a dream over something that looks like a "dream" but shoots like a nightmare.

Don't fear the gun...fear the one that's wielding it!

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Post by Digital » Mon Jan 02, 2006 12:06 pm

Jon
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"This is my rifle. There are many like it, but this one is mine. It is my life. I must master it as I must master my life. Without me my rifle is useless. Without my rifle, I am useless."
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Phantom Bushman

Re: Installing G&G Knock Arm & Plunger Set for Tanaka M7

Post by Phantom Bushman » Thu Sep 25, 2008 12:40 pm

Would it possible for the pictures to be reposted with updated links? This is the only article I have seen online about this upgrade.

I need a power pack as my impact plates are badly worn and give less consistant fps.

Thanks in advance.

Good Hunting :wink:

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