No, the Diamondaback DB10 appears to use Armalite-A pattern handguards.
No, the AIM Sports Inc AR-10 .308 M-Lok Handguard is only compatible with DPMS pattern AR10 rifles. It will not fit Armalite pattern rifles.
The AIM Sports Inc AR-10 .308 M-Lok Handguards do not come with a barrel nut wrench. The manufacturer does not state where the AIM Sports Inc AR-10 .308 M-Lok Handguards are made. For that information I recommend contacting AIM Sports.
CMMG MK47 Mutant is compatible with LR-308 High Pattern handguards. So the high profile AIM Sports Inc AR-10 .308 M-Lok Handguards will work with the CMMG MK47 Mutant.
The Smith and Wesson M&P10 is a DPMS Low Profile receiver. So the AIM Sports Inc AR-10 .308 M-Lok Handguard Low Profile model will work.
The AIM Sports Inc AR-10 .308 M-Lok Handguard is compatible with DPMS pattern AR10's. So it should work fine with a Stag10.
The AIM Sports Inc AR-10 .308 M-Lok Handguard is compatible with DPMS pattern high profile uppers. So it will work with a DPMS AR10.
The Bear Creek Arsenal AR10's are DPMS low profile pattern rifles. So the AIM Sports Inc AR-10 .308 M-Lok Handguard low profile models should work with that rifle.
This AIM Sports Inc AR-10 .308 M-Lok Handguard is compatible with DPMS pattern AR10's, so it will not fit that rifle. The handguard at the link below will fit that rifle but you would need to get a low profile gas block.
https://www.opticsplanet.com/armalite-ar-10-tactical-handguard-kit-12-inch-balck-10tachgd12.html
The AIM Sports Inc AR-10 .308 M-Lok Handguard will not work on an Aero Precision M5E1 Enhanced Upper. That upper was designed to only work with the Aero Precision M5 Enhanced Handguards.