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Marui lower receiver set, BCG,dust cover, forward assist knob in the picture are not included. This page is for Upper reciever only, please be noted.

The Full kit with the HAO made L119A2 lower is under production now and will be release soon


HAO represent you the HAO L119A2 Monolithic Upper kit (IUR) for Tokyo Marui MWS GBBR system. It's 100% fully compatible with Marui original lower receiver.

True monolithic upper receiver with handguard for your MWS , made with 7075-T6. Tough and slim.


HAO's L119A2 IUR upper kits for Tokyo Marui MWS are CNC machined from an Alloy 7075-T6 billet which is as same material as real firearm. You will have 10" one piece steel gundrilled barrel end with 1/2-28RH thread , CNC machined L119A2 style gasblock, Full RS spec steel made barrel nut, Hydraulic pressed heat shield, etc.,

And the HAO's charging handle (L119A2 style) is standard equipped in this upper kit. You may find more details on the right fo the page.


You may also purchase L119A2's accessories as following links:


Charging handle (Yet release):

Charging handle latch:

Heat shield:

Gas block & Gas pipe:

HAO C.C style ambi mag catch :

HAO C.C style castle nut (3/4 stakes):

HAO C.C L119 (Eccentric) Ambi selector for MWS:****** waiting for update

HAO FH556-216A Flash hider:


Anodizing / surface treatment disclaimer from Geissele for reference :

HAO's L119A2 CQBR Monolithic Upper kit (IUR) for Marui MWS

SKU: P19
    • CNC drilled Alloy monolithic 7075-T6 billet Upper
    • CNC lathed L119A2 Steel gas block & gas tube
    • CNC lathed, Gun drilled 10", 1/2-28RH Steel barrel
    • CNC machined L119A2 Charging Handle
    • CNC lathed Steel barrel nut
    • Hydraulic Pressed L119A2 heat shield 
    • CNC lathed Steel A2 type Flash hider 
    • L119A2 barrel nut assamble tool
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