I have an older leupold 34mm IMS set of rings that came on the mark 6's and I was looking for some aftermarket solution to being able to mount a raptar s/es on top.  I have seen a few pics of leupold bases that appear to have a badger condition one CLIF mount on top, but those rings are 35mm.  I have attempted to mount a badger 34mm condition one ringcap on my leupold 34mm base and the hole spacing is not the same.

Here is the pic I am referring to.

Does anyone know if any other ring cap mount will work with the older IMS 34mm bases?

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Similarly, I'm looking for this top ring mount rail myself, though not for the 34mm but the 35mm Leupold IMS.  Who out there knows what make and model this ring cap rail is?  Is this a Leupold rail because I certainly can't find it?

Hey, anybody out there, this "diving board" rail is still unidentified.  I even stumped a Leupold support specialist today.  If anyone knows anything about this mount, please reach out us.  I've so far searched to the end of the internet several times using several different search phrases to no avail.

Unless Badger has an uncataloged version, you're probably better off updating the whole mount.

Nightforce Ultramount + RAPi

Badger COM + CLIF

Geissele Mount + Reptilia Diving Board

etc

Well the RAPi doesn't come in 35mm and neither does the Reptilia Diving Board.  I have the C1 + CLIF but the CLIF doesn't have the direct connect threaded hole for the Raptar.  Using the Rail Interface Mount puts the Raptar about 1 1/4" higher than necessary.  The Badger Coaxial Rangefinder Mount ring cap DOES have the threaded hole but also doesn't come in 35mm.  

I've since learned that this unknown ring cap rail also does not have the threaded hole making it unsuitable for my needs but it doesn't squash my curiosity as to who makes it.

Knight's Armament makes the Viper Mount in 35mm and it has 3 threaded holes in the rail so it in combination with a Badger Unimount may be the solution for me here but surely someone somewhere can ID this rail for us.

Another option for 35mm is the Spurh ISMS with RAPTAR adapter:  https://www.milehighshooting.com/spuhr-a-0029-raptar-adapter/

Yeah I failed to mention that one.

I got two emails from Leupold today and they unequivocally stated that this rangefinder rail is not a Leupold product despite it being mounted to the Leupold Mark IMS.  Not unlike the the other mounts mentioned above that have aftermarket rails mounted on them.

Man I stumbled across this thread trying to figure out the same thing. Still no luck, I’ve messaged owners of guns with it and they keep a tight lip as well

OP, maybe you can have the smaller one machined out to fit the bigger tube diameter?

I know this is an older thread, but any luck with these?

A lil necro post but @Shakespearswhip also has a pic of the Mod H wearing it.  I sent those to Leupold and they played dumb stated it was an all Badger setup!  I replied BS and naturally never received another reply

I just added one to my MRAD I had the Sphur mount so I went with the Sphur A-0032 and the B&T BT43 quick mount. I did have to file on end of the B&T to get it to fit
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MPA makes a top mount to fit their mount, it comes in 30-34-35-and 36mm sizes...This might work for you with or without their mount.......

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https://masterpiecearms.com/shop/mpa-ba-mount-picatinny-rail/