MP5K and 9.6v

ambro25

G'Morning, Ladies and Gents,

Thanks to Mr ALDI (for getting a Dremel clone in yesterday @ €17, highly recommended for modders here) -
* the M4 6-position stock is now on and solid
* the vertical foregrip has been sawed off and the 'remnants' ground/polished

Meet my new secondary & erstwhile 'CQB special':



Now, quick question to anyone who's done this before: will a 9.6v stick battery (8 cells) fit in a MP5K top cavity, if the cocking handle is suitably shortened?
(I'm talking about the tubeish part inside the MP5K top gas tube, to which the handle is fastened)

kdouglas

Looks nice ambro, not sure about the 9.6v since i've never had a '5k myself, but i'd imagine it's possible, you'll need to be able to take approx 20-25mm off the cocking handle though for the extra cell

alternatively, you could look at permanently installing a custom battery into it with 1 or 2 cells inside the stock tube and access to battery for charging via the back of the stock tube

ambro25

kdouglas wrote: »

alternatively, you could look at permanently installing a custom battery into it with 1 or 2 cells inside the stock tube and access to battery for charging via the back of the stock tube

Not an option I'm afraid. The "ass plate" on the 5K is unchanged, save for an extra 2mm dia. hole just below the existing hole for the sling hook assembly. The stock tube cannot be accessed or I'd be losing assembly integrity (need to leave the existing sling hook assembly hole as is, because it's just the right dia. for the M4 stock tube screw).

kdouglas wrote: »

i'd imagine it's possible, you'll need to be able to take approx 20-25mm off the cocking handle though for the extra cell

Now that should be OK.

I've not taken it completely to bits yet (I've not even test-fired it yet :eek:), but looking at it "ballpark", I reckon I've got a good 30-35 mm to play with: inside the gas tube is a spring-mounted C-shaped cylinder (so not fully closed dia.) and the cocking lever/tab (on the outside) is screwed into the front end of it, so I've basically got just about the entire length of that 'C shaped cyclinder' available to cut off if needed.

Taking the cocking handle off (imaginatively), the battery space is basically all of the gas tube, from "the ass plate" at the back to the front sights assembly at the front (which cap the gas tube). I've lost maybe 2mm tops at the back, what with the bolt from the M4 (long) screw of the stock tube and the smaller bolt underneath (for an offset 'lug' through-screw, to stop any rotation of the stock tube).

I'd just rather read from someone who's done this already, before taking the plunge (esp. as I haven't got a 9.6V stick handy right now). All the same, I'll still be doing it regardless :rolleyes: Anyone got a 9.6v stick FS?

kdouglas

you could still put cells in the stock tube, you wouldn't need to cut any large hole in the "ass plate" to run cells through, just drill a small hole which would be big enough to put a wire through, of course it'd have to be a custom battery which would be installed permanently into the aeg

ambro25

Well, that's just it - I want to avoid permanent, in the same way I can have it with or without the M4 stock.

The only "permanent" things I intend for it are the removal of the foregrip (done) and changing the spring for the stock Marui one I had in my 552 (before I put in the Systema spring in that one). I believe using the stock Marui spring will downgrade the FPS a bit, about which I'm not bothered as (i) it's for CQB and (ii) I'd rather have the insane ROF (270 FPS spring + 9.6v = don't be on wrong end )

The spring change I'll do sometime this week when I take it all to bits (and shorten the cocking lever at same time).

Masada

yep as above and the hole that the sling eye usually goes in on the but plate of thoe is big enough for the wiring to go through., id imagine you would have enough room by removing the cocking lever but there might be a problem with routing the wiring down to the connector on the gun since you'll be pushing the battery in past the hole for the wiring to come out,. id say its do-able though.,

oh and that looks the buisness.,

Beast ASI

G&P M120 motor works wonders in them

You can fit a 12V in it, by using the Cocking Handle mod to fit the 9.6 in the cocking tube, and then 2 more cells in the foregrip.

Here is an excellent guide RE: Cocking handle mod

http://www.airsoftforum.com/board/index.php?showtopic=94739&hl=

ED E

ambro25 wrote: »

Well, that's just it - I want to avoid permanent, in the same way I can have it with or without the M4 stock.

The only "permanent" things I intend for it are the removal of the foregrip (done) and changing the spring for the stock Marui one I had in my 552 (before I put in the Systema spring in that one). I believe using the stock Marui spring will downgrade the FPS a bit, about which I'm not bothered as (i) it's for CQB and (ii) I'd rather have the insane ROF (270 FPS spring + 9.6v = don't be on wrong end )

The spring change I'll do sometime this week when I take it all to bits (and shorten the cocking lever at same time).

Will the mags feed that fast?

Beast ASI

It's not THAT fast at all, yeah, it would be fast but only around 20rps, most if not any mag should feed fine in it.

ambro25

Thx for the linkie, Beast

... but I'm afraid the foregrip mod is not an option anymore

(updated pix)

Beast ASI

No problem .

Ah, just noticed that - Guess you'll have to make do with a 9.6 then

May I recommend a 9.6 1500mAH made up of Elite cells - www.cheapbatterypacks.com. Them or Sanyo's, probably the best cells you could buy.

ambro25

It's been done time and again, but for anyone who's forever trawling teh Interweb for reference material about this mod, and further to a request by pm last night, here's a brief tutorial about how to put an M4 6-positions stock on an MP5K.

Firstly, a linky here (beware, all in French) with very good photos, and which highlights a very clean way of doing it (even using a bit of an M4 receiver for that extra 'pro finish' touch).

And now, my "halfway house" way, which is pretty straitghtforward (using a second screw/bolt instead of a bit of M4 receiver):

(i) take out the sling eye from the MP5K butt plate (it's held by a circlip, easy)

(ii) drill a second through-hole in the butt plate directly underneath the sling eye central hole, 2.5 to 3mm diameter (there's a pre-cut hole/recess already there, not quite drilled through: just drill there)

(iii) pass a 2.5 to 3mm diameter screw through that second hole and bolt it on inside (the screw head is on the outside of the MP5K butt plate, it will sit inside a lower recess which should be on the stock tube inner diameter, to stop the tube rotating about the main, long screw)

(iv) pass the M4 stock tube screw (the long one) through the sling eye hole and bolt it on inside

(v) grind/file down the 2 bolt+screws sets on the inside of the MP5K butt plate if they're too long, i.e. if they butt against the MP5K gearbox and you can't close the butt plate enough to fit the pins back in.

That's it, put the butt plate back on with pins and you're done

Fallschirmjager

looks great ambro....

i wonder can you put the normal mp5 stock in it? i always fancied one of these with the normal pull out stock.

did you look into that and scrub it as an idea?

also i see the classic army mp5k metal parts are discontinued...pity...

ambro25

Fallschirmjager wrote: »

i wonder can you put the normal mp5 stock in it? i always fancied one of these with the normal pull out stock.

Which do you mean as 'normal'? The J-type retractable or the carbine-type full stock? FYI, neither can be fitted to an MP5K (Galaxy or Marui or...).

For a full stock, you'd need a special adapter or a bepoke mod (which would be way more complicated than the M4 stock above).

The sliding J-type stock is a definite no-no, because the side grooves on the receiver (within which the stock 'branches' slide) are fully occluded. It would be easier to take a standard J-type MP5, and mod it into a MP5K "from the front".

There was a comment a while back from Popanddrop (or somesuch nick ) in the FS Forum that 'an MP5K has no stock', or that 'it's not an MP5K anymore once it's got a stock': the K (Kurtz = short) in MP5K relates more to the shortened front section (barrel etc.) and receiver, than to the fact that is has a stock or not. The PDW variant with folding stock is still denominated MP5K

Fallschirmjager

well i would not be so particular to be honest...its justa game to me, so i like the front of the k, but do like a stock

the one i was looking at was



but judging from what you said, thats a no no as well..pity...

ah well may well pick something else to mod that...

thanks for the details ambro...much appreciated..

Frank the Manc

a chap on arnies did this exact mod, it functioned and looked ok but it was a small bit rough, there is a bit of work involved but its not rocket surgery, and it does look very much the business.

the prob you run into is that the butt plate on the 5k is flat and just pops on the back of the receiver, wheras sliding stock butt plate actually goes over the receiver so you need to fabricate 2 bars to keep the stock in place.

Fallschirmjager

Frank the Manc wrote: »

a chap on arnies did this exact mod, it functioned and looked ok but it was a small bit rough, there is a bit of work involved but its not rocket surgery, and it does look very much the business.

the prob you run into is that the butt plate on the 5k is flat and just pops on the back of the receiver, wheras sliding stock butt plate actually goes over the receiver so you need to fabricate 2 bars to keep the stock in place.

thanks i will have a look see...

ambro25

Hey Falls, do you want mine? :cool:

Fallschirmjager

ambro25 wrote: »

Hey Falls, do you want mine? :cool:

sorry dude already have the ca metal body en route so i am cashless with that ...good luck with the sale...