Every part checked against this replica, grouped by category. The tag on each row says how well the answer is backed. Use the evidence filter to see only fits a maker or retailer has named.
G&P

MWS Steel Parts Combo SetFitsSpecs
T8

Enhanced Nozzle for MWSFitsSpecs
T8

Enhanced Nozzle Set V3.5 For Tokyo Marui MWSFitsSpecs
Guns Modify

MOE K2 AK GripFitsRecorded
Magpul
No direct modifications are necessary to the grip or the AKX itself though need a longer 5mm screw/bolt (at least 4mm more screw thread length) to reach as the insertion point within the Magpul grip is much lower and thus farther from the screw hole in the base of the AKX.

MOE-K2 GripFitsRecorded
Magpul
Very good fit. The grip's beavertail sits slightly proud of the base as the latter is designed for AR-15 rather than MCX but the fit is secure enough to keep the detent spring in place.

Easi Nozzle Spring for Tokyo Marui MWS & MTR16 SeriesFitsSpecs
Jaeger Precision

MWS 140% Nozzle Return SpringFitsSpecs
Bavtac

CNC Adjustable Trigger Box (A) for TM M4A1 MWSFitsSpecs
G&P

EVO CNC Trigger Box for MWSFitsSpecs
Guns Modify

EVO Steel CNC Drop-in Trigger box for MWS systemFitsSpecs
Guns Modify

Crimson NPAS for MWS TM / DE / SalvoFitsSpecs
Waldo Dynamics

MWS NPAS Adjustable ValveFitsSpecs
Jaeger Precision