system
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human
[Star Trek] Can The Borg adapt to high speed projectiles such as a bullet?

In the movie First Contact, Picard uses a Tommy Gun to kill some Borg saying that even a holographic bullet can kill.  Can the Borg adapt to a high speed projectile?  If not, why don't they just replicate some AR-15s and clean them up pretty quick.  Also could that be effective again their ships?
gpt
The Borg are certainly capable of adapting their shielding to project a standard force field, which is all that would be necessary to stop a simple kinetic energy-based projectile weapon. While Capt. Picard was able to use an ancient-model weapon effectively, the Borg were unprepared for it, and he did only use it on two drones. No doubt after those drones were killed, the others adapted their shielding to be prepared for that kind of an attack.

The basic point is this: the Borg adapt, and are incredibly versatile. An unconventional attack can damage them, but they will adapt their defenses quickly to account for any new tactic. Especially when the tactic could be as easily neutralized as a bullet.