M-1A1 Bangalore Torpedos was used to create gaps in the barbed wire and obstacles.
They basicly consisted of tubes wich contained a charge and could be put together.
In the final version, the Bangalore is carried inside the LCVP's the allies spawn in.
They can use it to create holes in the barbed wire beyond the shingle.
While carrying a Bangalore, the soldier cannot use his weapons, since both hands are needed to carry the two tubes.