If that is what it takes, then so be it. However, this is just the beginning, Im only just thinking about how it will work, when everything is on paper and I have my materials list, then I can worry about any problems I may run into. Thanks for the tips. I would not have considered this if I didn't have any experience in airsoft modding.

Well you better worry about that one before you trash a perfectly good body.

Yeah. Might work on paper. Real life? Not so much.

But good luck with that. You'll need it. Lemme know in a few months :D

Also, that mag does not exist in airsoft.

No, a G36/Sig/whatever mag is not an acceptable substitute if you're building a fricken' 7.62 platform.

Ok if he can still not grasp the idea that bullets are not all the same size, take this picture.
http://en.wikipedia.org/wiki/Image:30-30.jpg
The one on the left is 5.56 used by g36c, sig 556, m4a1/m16 and many more.
The bullet on the right is 7.62, see the difference?

could he just cut the tops off and affix them together? like so whats up in the magwell is the top of an m4 mag but what hangs out the bottom is a sig mag?
or like take apart a g36 mag and put it over an m4 mag. i dunno id just give up on it if i were him

RRRRRRRRRRRAAAAAAAAAAAAAAAAAGGGGGGGGGGGGGGEEEEEEEE EEEEEEEEE!!!!!!!!!!!!

Look, please keep all of your doubts and negative opinions out of this thread. I did not post this as a 'help-me' thread, I posted it as a declaration of my project. So please, wait for the photos like happy people.

well hes probly gonna end up with something thats all cut up and uglier than a duct taped ak or hes gonna end up with a gun and a bunch of parts he paid a lot of money for that are no longer usable

Ok. But maybe you should actually do it first and THEN tell people if it actually works. Which by the sounds of it won't cause you don't seem to grasp the idea of 5.56 vs 7.62 and the limited amount of parts we have to work with in airsoft.

Seriously, riddle me this:
Non-existant body
Non-existant mags

If you haven't done enough done enough homework to figure out that you will have to do a reciever for all intents and purposes from scratvh *couch*illegal in Canada*cough* and design, prep and build a whole new mag system and somehow manage to make this fieldable, you shouldn't post a "declaration of your project".

As for as this idea goes the only thing I can see even remotely (and I mean like almost god damn near impossible) working is mating a 416 upper with a SR 25 lower and only God can imagine what the alignment differneces for the hopup for the mags would be.

Plan B: Get a Sr 25 full build slap a 417 stock on it, some HK style sights and just keep telling yourself its ok!

This would be the best plan.

Still, SR25 upper =/= HK416 lower as far as the lenght goes