What is m-136?

As an AI language model, I can't tell which specific context and area you are referring to regarding "m-136." However, here are some general possibilities based on what I've found online:

• M-136 could refer to a type of rocket launcher used by the military, specifically the M136 AT4, a lightweight antitank weapon system. It is a shoulder-fired weapon that can penetrate through up to 17 inches of armor.
• M-136 could also refer to a type of fuse used in explosives, particularly in mining and demolition. It acts as a timer that controls the detonator's initiation of the explosive materials.
• M-136 could also be a product code or model number for a wide range of other items or systems. Without more specific details, it's impossible to determine what exactly those might be.