No, it will not be compatible.
The correct QD for this stock can be found using the following link:
https://www.opticsplanet.com/magpul-qd-sling-swivel.html
No, the Magpul MOE Rifle Stock would not accommodate a 10 round AR15 magazine in its storage compartment. While Magpul does not provide specific dimensions for the storage space, they state it is designed for smaller items like a cleaning kit, batteries, CLP etc.
The Magpul MOE Rifle Stock will work with that Aero Precision Rifle Buffer Kit.
The Magpul MOE Rifle Stock weighs 14.0 oz. and the Magpul Gen 3 PRS Stock weighs 27.8oz.
Yes. The Magpul MOE Rifle Stock will fit and function fine.
Yes. Please follow the link provided https://www.opticsplanet.com/magpul-cheek-riser-25in.html
To fit the Magpul MOE Rifle Stock on a VR80, you would need to remove your pistol grip and butt stock as well as your buffer tube. Replace your buffer tube with a rifle length/A2 tube as well as buffer and spring that is compatible with the A2 tube. At that point you could use the MOE stock.
No this will not fit it.
No, this stock is a fixed position stock.