Description:
Limited penetration is another technique that can be used where operators
don't initially enter the room.
This technique uses the
Pie-Slice Technique.
Each
operator is, positioned on either side of the door frame, then they pie
around the door frame, into the door opening (fatal funnel) to engage and
neutralize any threats that may be present in the room. This tactic is often
utilized when there is a high probability that a threat does exist inside.
The limited penetration method exposes only a very small portion of
the officer' s head and upper body to the potential threat.

Pros:
-Operators
have cover/concealment.
-Can initially clear majority of the room without entering.
Cons:
-Team is
compromised after performing limited penetration.
-The unit still have to enter the room.
-Initially can only employ two operators.