I have a NIB Magpul PRS stock, black, milspec for sale. The box says it fits both AR15 and the AR10. Was planning to do a build, but bought a Garand instead. Buyer pays actual shipping cost. $175.
What are you wanting $$
$175 plus actual shipping cost
They fit both but the cheek rest of the AR-10 model is shorter due to the longer charging handle. I had an AR-10 version on a 6.5 Grendel with no issue. Great stock.