Maruzen Extension Magazine Tube Kit For M870/ M1100 Gas Airsoft Net-Weight-(g)_3365.0 it is the infinity logo

it is the infinity logo for full auto and the number 1 for semi auto

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Package Include Steel Flat Trigger

If you're looking to add a touch of imagined fear from an imaginary ATF (Bureau of Alcohol

EMG (Dytac) Noveske NSR 9" M LOK Rail w/Gen 3 N4 Receiver Kit for Marui MWS GBB (Cerakote DE)

Maruzen Extension Magazine Tube Kit For M870/ M1100 Gas Airsoft Net-Weight-(g)_3365.0 it is the infinity logoKey Feature Metal Construction Airsoft Magazine Tube Kit Adds capacity for 4 extra shells Suitable For Maruzen M870 Series Airsoft Gas Shotguns Also Fit For Maruzen M1100 Gas Shotguns Airsoft Gun