WTS: MG42 Rail Installation & Alignment Fixture $79

ordnance_solutions · Post by **ordnance_solutions** » Wed Dec 27, 2006 5:32 pm

I have available a few of these precision made MG42 rail Installation and Alignment fixtures. Fixture holds rails in position with the centerline of the barrel bore for exact installation alignment. You'll get correct alignment and smooth function the first time with the use of this fixture. Easy to use and also great for checking rail alignment on problem guns and repair jobs. Made in USA to high quality Gage specifications. $79 each plus shipping.
Please email me for ordering info. Thanks~OSS
ordnance_solutions@sbcglobal.net

setlab · Post by **setlab** » Wed Dec 27, 2006 7:03 pm

Interesting jig. Do you make these?

ordnance_solutions · Post by **ordnance_solutions** » Wed Dec 27, 2006 7:21 pm

Yes, we make them and have used them on our builds.
~Ordnance Solution Services

Post by **URAR1004** » Wed Dec 27, 2006 7:35 pm

Does it fit an 8mm or .308 barrel?

ordnance_solutions · Post by **ordnance_solutions** » Wed Dec 27, 2006 7:45 pm

MG42 would be 8mm, but I can do these for the MG1/MG3 owners who have 7.62 NATO barrels only as well, price would be the same.
Thanks~OSS

Post by **drooling idiot** » Thu Dec 28, 2006 6:07 pm

how about turn one side for 8mm and the other for .308 ?
more work but easier supply chain.

ordnance_solutions · Post by **ordnance_solutions** » Thu Dec 28, 2006 6:16 pm

Good idea but this fixture will not work correctly that way. The linear positioning of the two different blocks are critical as to their placement along the length of the rod from the chamber end. This fixture is built as a gage and it's function is a precise one. That's why it works perfectly every time.

Post by **drooling idiot** » Thu Dec 28, 2006 6:45 pm

ah , didn't notice the blocks were pinned in place.
are you going to do a "how to use " thread on this ? It not necessary but I'd guess you'd sell more if guys understood how they worked , or i could be wrong again :-P

ordnance_solutions · Post by **ordnance_solutions** » Thu Dec 28, 2006 7:15 pm

We include an instruction sheet with each one, but a few pictures of use during rail installation would be good for all to see. Use of this rail alignment fixture is simple, it doesn't get any easier. Keep in mind this fixture is for proper alignment it is not intended to be used as a riveting jig.

-M60_Gunner- · Post by **-M60_Gunner-** » Thu Dec 28, 2006 9:21 pm

Ordnance_Solutions, check your IM's, I'll take one.

PvtJoker · Post by **PvtJoker** » Mon Jan 01, 2007 11:34 pm

Nice rig, but wondering if it might also be made to incorporate a sliding brass or copper backing block(s) for welding? Add a set of dimpled rivet blocks to such a device and you'd be set to go!

ordnance_solutions · Post by **ordnance_solutions** » Thu Jan 04, 2007 12:27 pm

Production was limited on these Rail Alignment Fixtures. Half of the available quantity for 8mm has been sold pending funds. Only 5 in 7.62 NATO are available.
Fixtures are shipping now.
Get one now if you are planning on building a 42 yourself, these are invaluable when it comes to proper alignment and smooth function.

Post by **MGMike** » Fri Jan 05, 2007 10:04 pm

I think this got lost in the site's server problems last weekend, but the check's in the mail

MikeD

PvtJoker · Post by **PvtJoker** » Fri Jan 05, 2007 10:39 pm

OK, so let me see if I understand how this works- this sits into the chamber of the barrel and then the rails (still unattached) are riding on it to confirm their placement in the rewelded receiver body, and then the front end of the barrel is used to confirm alignment of the barrel repair piece in the front shroud. Is that right, or am I missing something? Does this require new never-mounted rails to be fitted, using the existing rivet holes to mark the places to drill the new rails once they are held in alignment? Or are you supposed to fill in the existing rivet holes in the receiver and mark where to drill from the inside of the rails? (That would be... challenging to drill from the inside out) It does look like a useful product, but I'd like to grasp just how it works before buying one.

Post by **gdmoore28** » Fri Jan 05, 2007 11:14 pm

dagobert wrote:OK, so let me see if I understand how this works- this sits into the chamber of the barrel and then the rails (still unattached) are riding on it to confirm their placement in the rewelded receiver body, and then the front end of the barrel is used to confirm alignment of the barrel repair piece in the front shroud. Is that right, or am I missing something? Does this require new never-mounted rails to be fitted, using the existing rivet holes to mark the places to drill the new rails once they are held in alignment? Or are you supposed to fill in the existing rivet holes in the receiver and mark where to drill from the inside of the rails? (That would be... challenging to drill from the inside out) It does look like a useful product, but I'd like to grasp just how it works before buying one.

Glad you asked that! I won't be able to buy one, but I've been wondering exactly how one would use this tool.

GeeDeeEmm

ordnance_solutions · Post by **ordnance_solutions** » Sat Jan 06, 2007 9:51 am

The instructions for use and a picture that I previously posted after 28 Dec were lost when the board went down, I'll try and get them re-posted soon.
If you are building a re-weld and have a twisted or warped receiver in the front or back from the welding process this fixture is not going to help you solve that, those are totally different issues involved with building a re-weld. Also a little common sense will tell you pre exsisting rivet holes in a re-weld receiver and used rails with rivet holes that came from a different gun are not going to line up perfectly to reuse the exsisting rivet holes for installation. And only a tiny bit of common sense does it take to know that no one can drill rivet holes using exsisting holes on the rails from the inside of a receiver, that is beyond challenging. If you are building a re-weld go ahead and weld up all of the rivet holes and start fresh or buy new rails, otherwise you are just making the task much more difficult or impossible to do.
The rail alignment fixture is simple to use but it will not solve the unrelated problems that come from re-welding a receiver and using rails with pre exsisting holes. It's only purpose is to properly align and check alignment of the placement of the rails to the centerline of the barrel bore.

PvtJoker · Post by **PvtJoker** » Sat Jan 06, 2007 4:29 pm

ordnance_solutions wrote:The instructions for use and a picture that I previously posted after 28 Dec were lost when the board went down, I'll try and get them re-posted soon.

Sorry; I missed the pictures before the board went down.

If you are building a re-weld and have a twisted or warped receiver in the front or back from the welding process this fixture is not going to help you solve that, those are totally different issues involved with building a re-weld.

I wasn't expecting it to solve that issue; only to help make it stand out more. As I understand these guns, the receiver body needs to be straight, but what is crucial is that the bolt and barrel need to line up to lock up and release right, the recuperator has to be positioned correctly and the cover needs to engage the pin on top of the bolt in alignment.

Also a little common sense will tell you pre exsisting rivet holes in a re-weld receiver and used rails with rivet holes that came from a different gun are not going to line up perfectly to reuse the exsisting rivet holes for installation.

What I had originally planned on doing was using the existing receiver holes and the holes in the rail to locate the sections of the reweld spacing, then use a unistrut jig to mount it all on so it could be held in place when welding it (and checked for trueness while doing so), after remoing the rails and transfering their hole spacing to a pair of metal flats and brass or copper backing plates. I had thought that this tool might be helpful with checking the alignment of the cam section to the front shroud and rear portion.

And only a tiny bit of common sense does it take to know that no one can drill rivet holes using exsisting holes on the rails from the inside of a receiver, that is beyond challenging.

Hey, look, I was just curious if you had come up with some new idea on how it might be done. It's not a question of common sense; it was a question of innovation. I thought maybe you had an idea that hadn't occurred to the rest of us mere mortals- perhaps some method of dimpleing the locations from the inside to show where to drill through with the rails held in place with your product, or some such. I considered it mor challenging than I could solve, but I wasn't going to assume that because I couldn't figure out a way, that no one else could either.

If you are building a re-weld go ahead and weld up all of the rivet holes and start fresh or buy new rails, otherwise you are just making the task much more difficult or impossible to do.
The rail alignment fixture is simple to use but it will not solve the unrelated problems that come from re-welding a receiver and using rails with pre exsisting holes. It's only purpose is to properly align and check alignment of the placement of the rails to the centerline of the barrel bore.

OK, thanks.

ordnance_solutions · Post by **ordnance_solutions** » Mon Jan 08, 2007 5:30 pm

You're Welcome.
If you don't like how I addressed the issues you related, then please feel free to start your own thread about them. Asking how a product works is one thing, but discussing issues unrelated to what is being offered for sale here is in poor taste, they belong in a different area of the forum.
This fixture is not a riveting jig and no claims have been made as such. It's purpose is to set and check alignment of the rails to the centerline of the barrel bore ONLY for proper installation and functioning.

To use the rail alignment fixture for installation simply slide into rear of receiver until fully inserted into chamber of barrel, then place rails into correct position on the fixture blocks and make sure they are fully forward against the trunnion.
To use for checking alignment of rails already installed, just slide fixture into rear of receiver and position fixture blocks into rails as fixture is fully inserted into barrel chamber. If force is required to insert or fixture will not reach full depth into chamber, then the rails are not on center with the barrel bore and there is a problem with the gun.

Post by **Bil** » Mon Jan 08, 2007 7:25 pm

Whoa-excellant reply!And just what I needed to know.Hopefully my jig has been sent,so pics would be useful.Or does it come with pics/instructions.As for the other concerns,I am working on a (hopefuly) foolfroof jig where each receiver piece would be fixed in the exact position for welding.See thread elsewhere.Thanks ---bil

ordnance_solutions · Post by **ordnance_solutions** » Mon Jan 08, 2007 7:56 pm

I have received payment for several rail alignment fixtures and they are shipping as funds are credited to my account. I'll post pics and more info when I get the chance to pull out one of my 42's and a spare set of rails to use as an example.