View Full Version : mr1 sight rail mod

05-01-2008, 11:39 AM
Check it. :D

I think it would be good for BYUrdneck's Uzi.

Can anyone guess what it is made from?

I am doing a M4 right now, but when I do a sub machine gun, this is going on it. Depending on how you set it up you can make it into an open sight, handrail, or a stock. It is soild as a rock and can still be flipped around, just by loosening the bolts. I can think of about a million different ways you could configure it to look like a wire-frame skeleton stock. This was just what I settled on at first to get a proof of concept. If you replaced the metal frame with one you bent and shaped yourself, it could be any size or shape. You would only need the attachment. I don't really want to show the rest of the gun until it is finished, but I guess I need to for the sake of context. This will be my M4, so the sight/stock isn't appropos, but it gives you an idea of the size.






05-01-2008, 01:32 PM
Thats a good idea, but if is was a stock - it would have to be a lot longer to be able to shoulder it. Plus with the hopper and any type of sight, it would probably have to fold under the gun like this:
I measured for one on my MR-1 with the extended mag and I could run it - it would run the entire length of the gun. To make it I would have to custom bend a lot of metal and fabricate some sort of hinge stemming out of the original stock hole, encompassing the RVA and making it hollow to run the air lines out of. I could run micro line through the top of the trigger frame (like tech steve did) and into the hinge box and out the back via a remote nipple. here is a drawing of what I would do - man i love paint...

It would be a fun project to start - but unless money starts growing on trees, I will not be able to do it.

05-01-2008, 02:42 PM
oh yeah, i meant you could replace the metal arm piece with whatever shape/length you wanted. the hinge is still completely functional, so you could make it into a sight, handrail, or stock, depending on the length and shape of the metal. all you need to do is loosen the bolt and the hinge flips up and down.

you would need some metal bar to bend and a bender. i will post another pic in a minute, with it configured a couple of ways. the metal piece can be used any number of ways. I am planning on having one piece of metal for a folding stock for my m-4 (got the barrel a few minutes ago!) and this one for a quick open sight. also, i can easily see how this one could be used as m-4 style handrail as well, just flip it upside down, and adjust the angle a little.

i will have some more pics up in a while.

05-01-2008, 02:56 PM
looks cool

05-01-2008, 04:16 PM
here are some some other pics, to show you how the thing can move. It's the piece from a bicycle seat that allows you to adjust the seat angle. It grips to the seat post, so I removed it, hacksawed and dremeled the sharp edges, and then attached it to the main shaft of the cut-down (stock) stock where the seat post would normally go. If you replace the metal arm with some bar you bent, you could make any number of things.
Below is how I have it set up on my M4 until I get my rail and stock in the mail...just a couple of more days. Right now though, the cool thing is that it is so solid when you lock the bolts down you can actually carry the gun on the carry handle, and still use it like a sight, just like a real M4.
And then here's a pic of my fake suppressor, too. It's made of vacuum hose fittings. The holes were a ***** to drill. This, and the metal sight will be going on the SMG I am making when the M4 is all done.

05-01-2008, 04:32 PM

It would be a fun project to start - but unless money starts growing on trees, I will not be able to do it.

Love how that looks.

05-01-2008, 08:31 PM
that is a very good idea Mojo, and it looks clean. Yeah, finding some bar to bend with that setup could product some very unique stocks!

05-01-2008, 08:43 PM
I hope I am actually the first to think of this. That would be cool!

I believe it is 1/4 inch round steel, but I'm no expert on metal.

05-14-2008, 05:30 PM
where did u get ur chamber from?

05-14-2008, 05:37 PM
looks like an x7/a5 mag...

wow, i completely missed out on this thread! a few months ago, battlechaser and i were trying to figure out how to make a folding stock for a regular spyder. kind of like the combat shotgun from jurassic park. lemme see if i can find it...

05-14-2008, 05:53 PM
actually, it is a real one (ar-15 mag) from the army navy surplus store near me. i was going to buy an x chamber, but i run a remote line most of the time, and being florida, it isn't too cold here usually...

and yeah, this works great. just get some bar and you'll be all set. i am finishing my m4 right now, I have one piece outstanding (be here in two days) but i will be using this set up on a tec nine mod when i get enough money to buy another mr1.

05-14-2008, 06:01 PM
ah. the ridges threw me off. all of mine (well, my dad's) are army-issue ones and don't have the horizontal ridges.

edit: actually, theres a thread with pics of the ar-15 in the pics section.

05-14-2008, 06:06 PM
how did u manage to mod the magazine and make it fit and hold on the MR1. can u give me instruction so i can do it too.

05-14-2008, 06:51 PM
it's quite easy. first, disconnect the air hose on your mr1.

then, all you need to do is pop out the main spring inside the magazine, and fit the magazine over the existing handgrip on the mr1 (this may require cutting a little on the top of the magazine, and/or the handgrip to make it thinner, so that it can fit inside). try to get it to where you like the way it looks, and so that it wont be flimsy.

I then used marine grade epoxy paste to hold the magazine onto the handgrip (which is like setting it in stone) and made sure not to get it on the body of the gun (so that the handgrip can still be romoved normally later on for servicing). another neat thing about marine epoxy paste is that if you cover your fingers with a smooth damp cloth (like a t-shirt) you can actually shape the epoxy like clay, using it to fill hollow spots and bridge gaps (think bondo, but harder), and you can paint it later on. (this is also a helpful way to reinforce weak plastic you think might not stand up to a direct paintball hit, if you were to use a toy gun for a body kit, as an example)

after drying, hold the the airline up to the gun so you can eyeball where to drill your hole so the airline can pass through the mag to the bottom of the pistol grip.

alternately, there is a thread that shows you how to screw it on,
a. but i didn't have the same type of mag,
b. i didn't think it sounded strong enough to play on (mine is so strong now, the magazine protects the airline),
c. it sounded like too complicated a procedure

my way is easy, tough as nails, and it looks sick.

05-14-2008, 07:14 PM
yeah, the one i've seen you cut the bottom part of the foregrip off to allow the mag to slide on over it. i was actually going to do this to my friend's mr1, but he lost his m4 mag.

05-14-2008, 07:14 PM

would that mag do the job if i mod mine to AK.

05-14-2008, 07:33 PM
it would only be a matter of cutting it to make it fit the handgrip, but yeah, it should. :)

05-14-2008, 07:37 PM

05-14-2008, 08:09 PM

02-18-2009, 10:14 AM
I think I have found something that is a bit better still.

Just to make sure everyone knew, that site I mentioned that has all the Star Wars weapons replica designs has the schematics for making a FUNCTIONAL FOLDING STOCK. So long as you use heavier sheet metal, you can modify the design to work on any number of markers. I am in the process of making one with light grade metal on the model I just finished, but will have have a heavier duty one on the Stormtrooper MR1 I am making this summer (see last post on 'show your MR1').:)

These images are not to scale, obviously.




02-18-2009, 08:02 PM
Is that frome a bike seat??? and where did you get the mag from??????

02-18-2009, 08:16 PM

This stock pictured above (and in the post lower) is made from sheet metal that you would need to cut yourself. It is from the PVC Blaster Builder's Club, who provides the design (in the build blue prints for the E-11)...and there is no welding involved, just in case you're wondering...

The stock pictured at the bottom (in the original post) is from a bike seat, and I was using it to show how by replacing the bar with one you bent yourself, you could make any number of custom stocks. If you were doing an Uzi (or Tec-9, maybe) with a wireframe skeleton stock look, this would work well.

The mag in the lower photo I bought from a local army navy surplus. It is from an M-16, I believe. I gutted it and put it on...there is a thorough post about it somewhere....(hint: scroll down...:))

02-02-2010, 05:17 PM
ya where did u get that chamber i have been looking for one like that for my mr1