system
Given the following post, respond as if you're commenting on Reddit:
human
How do needlers work in the Halo universe?

I thought they exploded once they reached a point higher than a certain mass, but they're kept in the gun in pretty large quantities already, and in Halo Wars there are gigantic turrets that shoot massive ones at aircraft. I'm also pretty confused how they travel at such a low speed while remaining aloft and turning almost 90 degrees.
gpt
The projectiles are probably organic. It would explain how they steer and control themselves in flight and how they are able to identify a foe target and detonate when necessary. The crystals could also contain a form of plasma energy that requires several to explode, but has to be "armed" by moving at a high speed. Or is armed in flight like a 40mm grenade.