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there is one seller on Gunbroker right now that has (3) NIB 11715's @ buy it now for $2279.00 .. quite reasonable compared to what they have been selling for recently...

You can also remove the iron sights pretty easily. I find they clutter the optic and add extra unneeded weight. Decide which stock position you want to use primarily. I find the RMR to sit too low for the middle position of the collapsible stock. Fully extended it works fine. You can buy a spacer that fits between the RMR and the Scalarworks mount to raise the optic from Reptilia. They have 2.5mm and 10mm options depending on your preference. You'll have to modify the screw that come with the spacers to fit the Scalarworks, basically you're just shortening them to the needed length. This one is set up with the 10mm spacer.

If you do go the route above, the trigger guard helps hold your stock square on your M3 whereas on the SuperNova, it is held by the holes top and bottom. Is it possible/feasible to trim the trigger guard and drill that alignment hole in the M3? I know the new ones are quite a bit different than the ones I have which use a completely different recoil assembly type since they obviously have no receiver extension extending out the back. Another idea airborne, is in the early 90's there were limited imports of top folding M3T's. Factory correct ones will be HK marked and the folding stock will lock into the rear sight. If someone made one (non-factory) it will work, but it will not lock as the sights are slightly different position. I know collapsible is not folding, but just in case you weren't familiar. They pop up for sale periodically on GunBroker.com and other auction sites and generally go for $2k - $3k except during COVID/panic prices. Here's mine:

Great idea. I'll check that suggestion in the next day or two and report back. I don't know why it didn't occur to me to remove the stock from the 11711 and look at how it is oriented. Thanks guys. ?

Thats a 4moa H2, a hold over from before I got NODs. Ironically, when I turn it off, its like setting 3 of 4 NV on a T2 under nods. Now, Id recommend a T2 2moa. The mount is an ADM Ti mount in CAS-V height. The rail is an FFT. This combo has had good RTZ, and tolerated recoil from anything Ive thrown at it, including a fair bit of 3" 00b.

Don't remove the tube from the Supernova. Not only is the plastic in danger of being heat damaged, but the receiver is difficult to hold in a vice. What you want to achieve is basically the New Zealand M3 configuration: You would want: 70136 (or 61364), 70078, and 61171 (Supernova Plastic stock assembly). The plastic stock doesn't have a public part number, so you will even up with a extra pistol grip.

Along with what was said 8 years ago, inertia guns MUST be held tight for them to function. Make sure to hold tight to shoulder. I have a couple of the HK era M3T top folding models and are flawless if held firm, but I can intentionally keep them from cycling even once properly just by the way I hold it.