"It's the weapon of cavalry in my day. And useful on foot as well. Common enough for many years."

It's also a weapon of dueling -- less common than the rapier, but more favored by those who fight as soldiers rather than for pure sport -- but Enjolras isn't much a fan of duels. He suspects Percy is rather more favorably inclined, but he'd still prefer to speak of what he considers the more serious matter.

...And then there's what he's learned at Milliways, about the guns (and tanks, and bombs, and more) of later centuries. But, well. That's something Enjolras hasn't quite brought himself to study the practicalities of, yet. Not something Hotspur will know, anyway, he thinks.