Take double barrel SBS
Turn it sideways
Mount it under m4
Now have twice the power of m203 (M576 buckshot) with less weight.
And not a $5000 m26.
Who needs a magazine for door breaching?
>>34238489
Don't even have to turn it side ways
Just slide open
Who do you think you are, Ashton Kutcher? Just use a different gun instead of the undermount bullshit.
Congrats, no you have a double barrel that doesn't fire 40mm grenades