Analyzing the provided image, here's a detailed breakdown of the observed micro-expressions and body language:

1. **Eyes:** 
   - The brows are slightly raised, which often indicates surprise or curiosity. However, given the context, it might also suggest heightened alertness or anticipation.
   - The eyes themselves are focused and intense. The gaze is direct, suggesting confidence and determination.

2. **Mouth:** 
   - There's a faint smirk or half-smile on the left side of his face (from our viewpoint, it's on the right). This can indicate amusement, confidence, or a hint of sarcasm. The asymmetry of the smile, being more pronounced on one side, can sometimes be seen as insincere or masking true emotions.

3. **Face Muscles:** 
   - The tightness in the face, especially around the jawline, indicates tension or determination. It can also be a sign of suppressing stronger emotions.

4. **Body Posture and Objects:**
   - The posture is upright, and the shoulders are slightly forward. This posture conveys readiness and alertness. 
   - The object he's holding (which appears to be a weapon of some sort) reinforces the feeling of preparedness, potential threat, or dominance.

**Conclusions:**

- The individual seems to be in a state of alertness and preparedness, possibly in a situation requiring immediate action or response.
- The faint smirk suggests confidence in the situation, possibly indicating that he feels in control or has the upper hand. However, the asymmetry in the smile might mean that this amusement or confidence is at least partially a front, and he might be masking some underlying tension or apprehension.
- The intensity in the eyes, combined with the tightness of the face, suggests genuine focus and determination. This likely isn't a relaxed or casual scenario for him.
  
Considering all these observations, the person might be trying to convey an image of calm confidence and control to those around him, while internally, he might be experiencing tension and heightened alertness due to the situation at hand.