The FAB Defense AK-47 Survival Buttstock W/Built-in Magazine Carrier is designed to accommodate all standard 7.62×39 AK-47 magazines and FAB Defense ULTIMAG magazines.
The FAB Defense AK-47 Survival Buttstock W/Built-in Magazine Carrier will not fit an AR10 magazine. This FAB Defense AK-47 Survival Buttstock W/Built-in Magazine Carrier will only fit AK47 magazines.
The manufacturer states that the FAB Defense AK-47 Survival Buttstock W/Built-in Magazine Carrier is compatible with a 10 round magazine. I recommend contacting the manufacturer to see if it is compatible with a drum magazine.
Yes, the built in mag holder should fit a full size 30 round magazine.
This stock should have no problem fitting most commercial or mil-spec buffer tubes.
Unfortunately, the Fab Defense cheek risers will not work with this stock. You will need a universal cheek riser.
This stock will install onto any multi-position carbine or A5 buffer tube. This would give the shooter the ability to adjust the length of pull.
Yes, this stock will fit both mil-spec and commercial tubes. The Savage Moeld 10 Ashbury Precision Rifle uses a mil-spec carbine buffer tube. It should be compatible.
This particular model would fit onto an AR-15 but likely would not fit an AR magazine properly. Here's a similar stock for the AR platform.
https://www.opticsplanet.com/fab-defense-gl-core-mag-cp-m4-survival-buttstock-w-built-in-mag-carrier.html
Yes, this stock should fit that buffer system.