No one?

Hmm. I might take the plunge and give it a shot.

I guess I could always try and find an A1 frame, and swap my slide onto it, but that seems an unlikely find.

Most products from NC Star are sub-standard. I had a scope from them years ago, bought it on a whim...it was a POS. Since then I've read various reports of the their products as being of the same quality. FWIW I wouldn't purchase a product from them to be used on a defensive item, if it's for "a toy" go for it, otherwise test it as best you can before continuing to use it for defensive purposes.