Ar Front sight base for Tavor?

[rm_rang]

Hey guys

So a little while ago I figured I'd try and track down a bayonet lug for my Tavor, just because I can kinda deal.

I found a couple different options such as a clamp on bayonet lug, which seems kinda flimsy to me and is bulky for what it is.

2nd is a stand alone pin on bayonet lug which would certainly be exactly what I was looking for but then in donned on me.... this could be so so much better and solve several "issues" at once...

I got the Gearhead works short razor back rail on my Tavor and its great but it leaves me with no way to mount a front sight short of buying the Gearhead works flip-up front sight which is not being made anymore and seems to be impossible to find.

So my idea here is to have a AR15 front sight base, 3d printed with metal (the 2 bayonet lugs mentioned above are 3d printed with metal), to be tall enough as to be able to match up with any standard AR15 rear back up sight, delete the sling swivel mount on the rear mounting loop of the sight base and replace it with the bayonet lug, leaving the front mounting loop blank. this will ensure the lug is far enough back to allow the bayonet to be mounted on the 18".5 inch barrel, while simultaneously scratching my AR itch and providing me with my front sight. (This would be a pin on style as well, on both mounting loops)

So my questions here are as follows, and please, if you don't like the idea or think its stupid please just move on and keep it to yourself as its not productive to this discussion. I realize that it is a "pointless" endeavor but as I mentioned above it started as a " just because i can" or "why not" kinda thing.

So again my questions are:

How would I take an ACCURATE measure from the top of my barrel to the focal point of the rear backup sight in order to ensure the front sight is at the same height as the rear sight? I am not sure where they should line up IE at the flat bottom of the sight post, middle, top exc. Please understand that the rear sight I will be going for will be fully adjustable (not sure if my 3d printed front sight would be adjustable for elevation, I'm thinking a fixed post and find a rear sight that is adjustable for windage and elevation to keep production as simple as possible) but if the front sight height isn't close enough to almost be perfect this wont really be worth doing. I had thought of just using a tape measure and kinda eyeballing to with the rear sight but again I don't feel this would be accurate enough.

Next does somebody have a cad file, or know where to get one, so I would have something to start with and modify it as noted before by moving the bayonet lug and making it taller?

And lastly, as I have zero knowledge of this 3d drawing software (that said if nobody cant help Ill give it a go myself, just will take 5x as long) is there anybody on here able and willing to give me a hand is drawing/designing this part in a 3d printer friendly program?

Thanks guys and take care!

Here’s a concept photo by daver_II


And I’ll attach my rifle to show my rail height being higher than standard thus needing a higher front sight than the prior pictured rifle

 

[Daver_II]

Well.....

Yes....


It could be done, but a 3d printed part (even out of metal) would not be nearly as strong as a clamp on style.

Plus with the forces a bayonet would produce to be functional, I think you would hebe a hard time.... it would be easy to be as for looks only.

What bayonet do you want. To use? One that has a ring on the barrel?

Had you considered a rail mounted bayonet system?

 

[rm_rang]

I hadn’t seen a rail mounted bayonet system no.
But I don’t think I’d go that route if I wasn’t going to do the Ar front sight base concept I’ll just go with a pin on stand alone bayonet lug

Although I don’t really have any plans to use a bayonet as a bayonet for it to function would be nice. I didn’t think 3D printing of metal was that weak since they made a functioning 1911 that way but I may be wrong

How are the front sight bases originally made? Are they cast? Maybe I can take my plan of 3D modeling it but instead make a mount and cast them myself? I imagine machining one would be possible but I’d be willing to bet it would be cost prohibitive. Although maybe an automated CNC machine of some kind can make short work of it provided there’s a 3D cad drawing of it?

 

[Daver_II]

so are you talking about a railled FSB? or a triangle? or folding?

Lots of possibilities.

 

[rm_rang]

One of these bad boys but modified as I described

Sorry I just assumed that the FSB was this unit I didn’t realize there were variations

Now that I look at it this might be set screwed on rather than pinned on? Maybe I was wrong but I again assumed they were pin on but maybe again there’s more than 1 way to skin a cat

 

[call2arms]

One of these bad boys but modified as I described
View attachment 542331
Sorry I just assumed that the FSB was this unit I didn’t realize there were variations

Now that I look at it this might be set screwed on rather than pinned on? Maybe I was wrong but I again assumed they were pin on but maybe again there’s more than 1 way to skin a cat

Pin on is the standard.

Put a straight edge on the rail and measure the distance to the barrel. Then measure how much higher the rear sight is above the rail to get the approximate front sight height.

 

[rm_rang]

Perfect that makes sense. A ruler going over the rail extending to the barrel.

Man that’s so easy thanks for that

Would anyone be able to get the measurement in this picture from their a2 style Ar using the above method?

That will solve my height question then all I gotta do is draw it

View attachment

 

[onetwentyish]

Interesting project.

Where do you get stuff 3D printed in metal at?

Very expensive?

 

[rm_rang]

I was going to approach these guys who 3D print the stand alone lug once I get a drawing done up for them to utilize

https://cogburnarsenal.com/product/bayonet-lug-pin-on/

Mods please unhyper link as I am incapable of figuring out how to do so myself

Interesting project.

Where do you get stuff 3D printed in metal at?

Very expensive?

 

[lawn gnome]

Have you ever thought of just the ring and fixture and then upside down or sideways?
The G3 bayonets are on the top over the barrel.
A lot of previous rifles had bayonets that were at 90 degree angles so the flat of the balde is parallel to the ground.

With such a short bullpup, maybe the longer bayonets like a first war sword bayonet or the swiss '57 pattern are not such bad ideas.

 

[call2arms]

This arrangement may get you close but I think it will still be low. The other issue is the diameter of the barrel.

warmachinellc.com/product/warblock-75-high-t-4

 

[rm_rang]

Thanks to JasonGTA I have got the dimensions needed.

No I just need to figure out how to draw this in a cad program

Thanks for all the help guys and again if anyone is willing to help me draw this up in a CAD program it would be thankfully received and faithfully applied!

 

[Mesayat]

Hah this is an awesome little project.

 

[rm_rang]

 

[rm_rang]

So there it is

First pic I folded the extension portion to show what the original would be, except the repositioning of the bayonet lug, and 2nd is with the extension added

Since it was quite a bit taller I added a 2nd hole above the barrel to insert a mini solitaire mag light. I would never use the flashlight but this way it doesn’t make it look needlessly tall!

Only down side is this is designed for the tavor 21 with the gear head works short Razorback rail. If you wanted it done to be used with the original, lower flat top rail it would work but I don’t think it would be tall enough to include the flashlight mount as you’ll be losing 1/2” in height in the extension portion

 

[rm_rang]

Absolutely not to scale but I printed out some pictures and cut and rearranged to TRY and better show my goal here




Please forgive the craftsmanship here I haven’t played arts and crafts since elementary school and I couldn’t even figure out how to just edit this picture in Microsoft paint much less 3D render it

 

[Daver_II]

Ill do up a CAD file for you.

Ill even print a prototype.

 

[rm_rang]

Awesome thank you!

If this prototype ends up working out well would anybody else be interested in one? Might help keep costs down to do more than one or 2