[A 7 Round tube does NOT always fit 7 rounds in the M4]

On 2/19/2019 at 3:50 PM, artES said:

I had the same problem with an aftermarket +2 extension. Ended buying the orinigal mag extension from Benelliparts with a new spring and now I shoot 9 rounds of whatever I want from my M4

I recently purchased an OEM 7-round magazine extension from Benelli parts and a new spring and it will only hold 6 rounds.