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Mods to my MP7 (WIP)


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#1 dobey

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Posted 23 February 2010 - 10:19 AM

I have had this for a few days now and love it, but there are some things I would like to change.  

First thing up is the stock.  I love my guns close and tight, and so I added another setting to the adjustable stock:

A shot of the ejection port side rail before cutting:

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Here it is in the mill getting a new notch:

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And here is the other rail after getting its new notches (top and bottom):

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It now locks right where I want it:

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In this configuration it opens normally, and locks in the middle position automatically.  Just use the regular lever at this point to continue opening to full position, and to get it closed all the way again you simply use both levers like you would to remove the stock completely from the gun.

Next on the list, a 12mm to 14mm adapter so I can get some attachments on that barrel, I will be back in a bit with that mod.

#2 dobey

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Posted 23 February 2010 - 11:18 AM

Here is a new 12x1.0 CW to 14x1.0 CCW Thread adapter.  Will get a pic up on the gun after it gets done in the Black Oxide Bath.  BTW anyone care to share what the coating on the stock slide rails is?  Because I cut mine up a bit I was going to blast them clean and use the black oxide coating but I am unsure what type of aluminum it is made from.

Posted Image

#3 Spiggy

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Posted 23 February 2010 - 11:29 AM

that's some really nice work there man.  What kind of mill do you run?

#4 jotohomomoto

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Posted 23 February 2010 - 11:48 AM

I want to do this to my stock but I lack the tools and know-how and don't want to F up my stock. Another member on here gave me instructions but i haven't seriously pursued it.

#5 dobey

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Posted 23 February 2010 - 12:11 PM

The Mill is a benchtop model from harbor freight.  If you wanted to do the notches by hand I would get a thin piece of aluminum from your hardware store and practice, it shouldn't cost more than a few dollars.  After a few practice runs if you like what you see do it on the real part.  To get good results hold the rail in a vice so it does not move, and use long smooth strokes with the file.

#6 Spiggy

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Posted 23 February 2010 - 04:32 PM

on the thread adapter:

sandblast it, give it a light heat up with a heat gun and lightly semi-matte krylon rattlecan it.  The paint will bake onto the aluminum.  It should match the rails, I finish some barrels with this method when I don't have a lot of time and need a cheap durable finish.  Afterwards, you may want to run the tap and die over the threads again.

cool to see another machinist on the forum!

#7 dobey

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Posted 23 February 2010 - 05:06 PM

That is exactly what I did to the flashhider, blasted it with fine, heat it up carefully with a propane torch till it sweats out, then used matte black rustolium (local shop carries rustolium camo series paint but not krylon).  

This is SOP for most aluminum airsoft parts because the alloys the manufacturers use tend to not like anodizing.  I have a new black oxide setup from Birchwood Casey that is very easy and seems more forgiving, I may try it on some of the MP7 pieces as I cut into them a bit more  :rofl:

#8 Spiggy

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Posted 23 February 2010 - 05:58 PM

I've got the same stuff from birchwood casey.  It's great for touch ups, but using it for a complete part refinish is a nightmare.

#9 jotohomomoto

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Posted 23 February 2010 - 06:39 PM

View Postdobey, on 23 February 2010 - 12:11 PM, said:

The Mill is a benchtop model from harbor freight.  If you wanted to do the notches by hand I would get a thin piece of aluminum from your hardware store and practice, it shouldn't cost more than a few dollars.  After a few practice runs if you like what you see do it on the real part.  To get good results hold the rail in a vice so it does not move, and use long smooth strokes with the file.
thats a good idea, I'm going to have to try that!

#10 dobey

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Posted 25 February 2010 - 02:27 PM

Made a can for my MP7 today, based it on a real one I saw a picture of on the hk website, am loving the look:

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What to do next...

#11 Spiggy

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Posted 25 February 2010 - 02:49 PM

modify your receiver pins so you can insert and remove them from any angle

#12 dobey

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Posted 25 February 2010 - 03:41 PM

I have not taken them out yet, can you elaborate, and just for fun made a single cone amplifier, wow what a great sound it gets now:

Posted Image

#13 Spiggy

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Posted 25 February 2010 - 04:06 PM

I will PM you the concept

#14 Vamp2269

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Posted 26 February 2010 - 01:14 PM

damn i cant wait for the thread adapters to come out.

btw nice work dobey that is crazy awsome

Edited by Vamp2269, 26 February 2010 - 01:15 PM.


#15 gcw360

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Posted 26 February 2010 - 02:31 PM

View PostVamp2269, on 26 February 2010 - 01:14 PM, said:

damn i cant wait for the thread adapters to come out.

btw nice work dobey that is crazy awsome
Best thread I've read in a long time. Excellent work Dobey. :notworthy:

#16 Starkweather

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Posted 27 February 2010 - 07:10 PM

Thats some sick work Dobey. I hope to see it next weekend!

#17 Hitman07

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Posted 03 March 2010 - 02:23 PM

View Postdobey, on 25 February 2010 - 03:41 PM, said:

I have not taken them out yet, can you elaborate, and just for fun made a single cone amplifier, wow what a great sound it gets now:

Posted Image

I like this. ^

When is KWA coming out with the [barrel extension] and HPV kit for the MP7???

Thanks

#18 dobey

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Posted 08 March 2010 - 01:58 PM

Ran it as my primary all afternoon Saturday in 35 degree weather, I never felt outgunned and it performed like a champ, best gas gun I have ever fielded.

#19 Hitman07

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Posted 08 March 2010 - 04:48 PM

I love what you did to it...wish I had machinery to do that. esp to the stock. I want a 3rd party company to make a [barrel extension] for it. And that HPV kit sounds interesting.

#20 Guest_MetallicaFatCat_*

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Posted 04 April 2010 - 12:40 PM

Great work Dobey and if I may ask are you the same one who runs Dobey Custom Works and made one of the WA2000s on ASR?




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