GDI and Spuhr are fine pieces of kit (have a few Spuhr mounts myself) but the added cost is pretty much wasted if you don't intend on taking advantage of the add-ons they offer....or need a mount for your Ultra Short. Yeah, GDI has the best QD return to zero, but we figured out a long time ago, that isn't as important as we though. The Badger and NF style unimounts do just fine if you want to leave it be.
The 34mm at 1.3xx" or so is probably fine with this combo.
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