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M2 and M4 entry (SBS) magazine extension


corbon
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The M4 Entry mag tube is the same length as the standard US M4 tube, minus the faux extension on it that holds no actual rounds....

 

If you put a full length mag tube, such as the FFT or the CC, it will stick out beyond the barrel - and you would no longer have a way to secure the barrel assembly to the chassis.

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Yes the only "upgrade" for the SBS magazine is a CarrierComp Ti unit. Same length & capacity, slightly lighter.

 

One thing some folks with the SBSs do is pickup a full length CarrierComp Ti magazine (seven shell mag) plus an 18.5" barrel assembly so that they can swap over to a non-NFA configuration for impromptu interstate travel or other apps where the nine shell capacity is beneficial.

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Yes the only "upgrade" for the SBS magazine is a CarrierComp Ti unit. Same length & capacity, slightly lighter.

 

One thing some folks with the SBSs do is pickup a full length CarrierComp Ti magazine (seven shell mag) plus an 18.5" barrel assembly so that they can swap over to a non-NFA configuration for impromptu interstate travel or other apps where the nine shell capacity is beneficial.

^^ What he said. I too am not aware of any "magazine extensions" from Benelli.

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