Perhaps my google fu is too weak to find it.
I got this idea because I've been looking for an accurate, 223 bolt action that is easy to shoot offhand, has pretty good accuracy (looking for .75 moa, better if I can have it).
I can work on an AR. I can do anything with an AR that doesn't require a lathe or a mill. Accurizing an AR simply means fitting a good barrel (if you don't already have one) and using a free float handguard. This is easy to do. The downside of a semi, however, is that I can't neck size my spent cases. They tend to not feed in semis.
Bolt actions, I can't work on as much. I can rebarrel something like a Savage, but peak accuracy in a bolt gun requires bedding the stock. This outside what I'm able to do. One of the advantages of the AR platform is that you avoid all the crazy stock bedding dog crap. You don't have to have it perfect because there's not stock to bed at all in an AR. But, as mentioned above, with an AR you lose the ability to neck size your ammo.
I think the solution here is obvious. What I need is a bolt action 223 / 5.56 upper. No BS trying to get the stock bedded perfectly, and the ability to neck size my reloads, all on a standardized platform with more accessory support than any other platform ever. I figure the best design would be an upper that doesn't use feed ramps and has the chamber a little further forward than on a regular semi auto upper to facilitate traditional push feeding as is done in the majority of bolt guns. Not sure if neck sized ammo would fit well in an AR magazine, might have to think about a single stack mag if not. It would provide all the advantages of the AR platform, the advantages of a good bolt action, and none of the disadvantages.
My searching has not turned up anything, and wanted to see if anyone here knows if such a thing is even made.
One of these days, if I win the freaking lottery or something, I'm going to get some proper machine tools and some training so I can make some of these ideas happen.