In checking the FX schematics for the 1st regulator on the Impact M3 and the Maverick, I'm seeing the same part numbers for all parts with the word "regulator" as part of the description...
Impact M3 19695 Regulator Screw Impact
19697-1 Regulator house
19696 Regulator piston (long) (May 2017>)
Maverick 19695 Regulator Screw
19697-1 Regulator house
19696 Regulator rod
It would seem that based on the parts above, the Saber Tactical 1st Regulator Bypass would also work on the Maverick...
FX Impact M3 First Regulator Bypass ST0039 I'm going to call Utah Airguns this coming week to see what they have to say about it. You might want to do the same