Dummy breacher choke for Tokyo Marui M870 Breacher airsoft shotgun

Important
This is intended for airsoft purpose only. Do not use it on any sort of firearms.
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Description:
A dummy breacher choke for TM M870 Breacher airsoft shotgun. This design is not tested on the TM M870 Tactical, there is a possibility BB will hit the choke before leaving the barrel.
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Extra material required:
none
Extra modification required:
none/reversable
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Step to install:
1. Just plug it into the muzzle.
2. When removing the choke, gently twist to both side