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

Gas M4A1 series 20-round short magazineFitsSpecs
Tokyo Marui
M4A1 MWS spare magazine (35 rounds)FitsSpecs
Tokyo Marui

Enhanced Nozzle for MWSFitsSpecs
T8

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

MOE-K2 GripFitsRecorded
Magpul
Very good fit. Beavertail of the grip is slightly proud (designed for an AR-15 rather than MCX) but secures the 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