From Strategy Page:Israel knows that Hamas has been stockpiling an arsenal of rockets in Gaza, and may be bringing in some with a range of up to 40 kilometers. Israeli intelligence officials believe Hamas currently has, in Gaza, several hundred factory made BM-21 rockets, each with a range of 20 kilometers. They also have some shorter range (six kilometers) B-12 rockets. These are not smuggled in much, because the locally made Kassam II has about the same range. However, the B-12 is more reliable (more reliable trajectory and fuze, so more are likely to land where aimed and explode.)
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My Comment: Hamas is clearly positioning themselves for the next fight against Israel. If Hamas starts to smuggle shape charges for their IEDs, an escalation in this conflict will occur.