Yes, the correct DeSantis DSD Shoulder Rig Holsters for your Mini Uzi are MPN:M10BAMG90 (Right Hand), and MPN:M10BBMG90 (Left Hand). These holsters were designed to fit most sub-machine guns and is equipped with a magazine pouch for 9mm.
The DeSantis DSD Shoulder Rig Holsters will fit a Mac 11. You would need the 9mm version which provides 2 magazine pouches for extended subgun magazines.
Yes, this should be compatible
It should fit with the brace closed.
It should fit with the brace closed.
The 9mm model should work for the Uzi. DeSantis does not make one specifically for the Tac14.
The 9mm DSD should work if you have the Masterpiece Arms Defender in 9mm. It will not work with the 5.7 Defender variant.
The 9mm DSD should work for the mini Mac 9 clone.
The DSD 9mm should work for the B&T APC9 PRO, just fold the brace over.
It has become a known issue that magazines for the MPX do not fit in the 9mm variant of the DSD. You may need to get the .223 variant of the DSD for them to fit, knowing that there will likely be some extra space.