RifleGBBRM4 / AR-15 · Z System

Tokyo Marui

M4A1 MWS GBB

Tokyo Marui M4A1 MWS GBB airsoft replica based on the M4 / AR-15 · Z System platform. Explore its technical specifications, official manuals and identified parts.

173VERIFIED PARTS1MANUALS

VERIFIED DATA

Technical specifications

Sourced

Model: M4A1 MWS GBB · MGG2
System: GBBR · Z System · adjustable hop-up
Fire modes: Semi-automatic / automatic
Length: 777 / 854 mm
Weight: 2,970 g with empty magazine
Inner barrel: 250 mm
Ammunition: 6 mm BB · 0.20–0.25 g
Magazine: 35 + 1 BB
Piston: 19 mm
Muzzle thread: 14 mm CCW
Stock: 6-position adjustable stock
Stated age rating: Ages 18 and over

Architecture

Gas-blowback engine with a 19 mm piston and moving bolt.
Z System reduces wear at the bolt catch, supported by a piston absorber and friction-relief bolt roller.
Barrel clamping system maintains centring under recoil.
Cerakote-finished receivers and bolt, a four-sided metal R.A.S. and a 14 mm CCW muzzle thread.
Semi-automatic/automatic fire, lock-back on an empty magazine and AR-pattern field stripping.

Compatibility and limits

This profile covers the original Tokyo Marui M4A1 MWS GBB with MGG2 references; it does not cover the M4A1 AEG, NGRS, CQBR, Mk18 or MWS clones.
M4 AEG magazines are not compatible; it uses 35-round MWS gas magazines.
An MWS-compatible label does not guarantee drop-in fit: confirm reference, brand and generation for the nozzle, bolt, trigger box and hop chamber.
Official family variants share the MWS core, but external parts may differ by length, handguard or receiver.
Tokyo Marui specifies HFC134a or Non-Freon Gun Power gas; always follow the current manufacturer guidance and operating temperature.

Basic maintenance

Remove BBs and gas before disassembly; remove the magazine and check the chamber.
Clean the inner barrel with hop pressure released and do not apply lubricant inside the barrel.
Lubricate only the areas identified by the manual and avoid contaminating the hop rubber or nozzle.
Inspect magazine seals, feed lips, valves and gas route if leaks or feeding faults develop.
Check the nozzle return spring, piston cup, bolt roller and bolt catch if cycling or lock-back becomes unreliable.
Do not store the magazine fully depressurised or exposed to heat; consult the linked technical guide before servicing.

Source verified · checked on 06/08/2026Open Tokyo Marui

EXPLODED VIEW / COMPONENTS

Verified parts

Reviewed

Official parts

Original components identified by the replica manufacturer's reference.

164 references

REFERENCEPART / COMPATIBILITYMANUFACTURER / TYPE

MGG2-1Diagram 1 · Muzzle device

Compensator

Original Tokyo Marui M4A1 MWS GBB, MGG2 reference series

Tokyo MaruiOfficial

MGG2-2Diagram 2 · Muzzle device

13 × 2 mm muzzle O-ring

Original Tokyo Marui M4A1 MWS GBB, MGG2 reference series

Tokyo MaruiOfficial

MGG2-3Diagram 3 · Muzzle device

Flash-hider washer

Original Tokyo Marui M4A1 MWS GBB, MGG2 reference series

Tokyo MaruiOfficial

Upgrades

Compatible aftermarket components intended to replace, reinforce or modify the original assembly.

9 references

REFERENCEPART / COMPATIBILITYMANUFACTURER / TYPE

GM0522Bolt

Steel bolt stop

Tokyo Marui M4A1 MWS / system MWS

Guns ModifyUpgrade

GM0268Trigger

CNC steel Two Mode hammer

Tokyo Marui M4A1 MWS / system MWS

Guns ModifyUpgrade

GM0526Trigger

GEI EVO trigger assembly with 100–180% adjustable hammer

Tokyo Marui M4A1 MWS / system MWS

Guns ModifyUpgrade

This catalogue identifies parts and compatibility; it does not show prices, stock or sellers. Verify dimensions and version before replacing a component.

View the 173 verified parts

DOCUMENTATION

Manuals and guides

PDF

Official manual · JP

Official manual and exploded diagram — M4A1 MWS GBB

4.3 MB · Source: Tokyo Marui

Read guide Open official

AirsoftDB links to the document source and does not host or reproduce these files. AirsoftDB guides are independent summaries, not official translations. Always check that the brand, model and version match.