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Originally Posted by BR
I guess it could be done if you cut a channel in the bolt for the hammer in the lower to hit the firing pin. I’m guessing the market is limited enough that the price would make you cry though.
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Making me cry over price would be easy.
I don't think the challenge is design and engineering, but limited audience.
A Tubb rifle can be a five figure proposition. I envision a poor man's Tubb rifle - a bolt action with AR ergonomics and more AR parts than an RPR. I don't think the bolt design would be the problem - with the gas key removed and the back half of the barrier cut off, one should be left with a cylindrical shape that can rotate.
The design problem I see is the upper itself. With a channel for a bolt handle running all the way out the back of the upper the whole thing will be less stable and rigid. Maybe a steel upper would be the answer. since the charge handle would not be an element, that might be an area to add material as well.
This would allow construction of a free floated bolt action rifle with any AR lower, barrel and handguard. It seems like a reasonable extension of AR modularity.
EDIT - I can see the objection that this is a lot of trouble for little benefit. One might get much of that benefit from a side charge handle. I've never seen one that didn't look delicate or clumsy to use, and are optimised for semi-automatic rifles.