"Would you believe we've never really dealt with anyone with firearms before, back home?"

It's only something that's occurred to Donnie here. All the opponents they had ever fought back home were largely hand-to-hand or had some kind of special ability. "...not to mention we didn't often fight against humans. Around here is the first time we've had any run-ins with people like that." It's actually how Leo came across him once Donnie had managed to make it to Central, confronted by a would-be gang throwing their weight around for territory.

"I'm not about to try deflecting bullets with a bō. If someone brings a gun to the party then it's better to keep moving and avoid being an easy target. Cut the distance when you're not looking for cover. That's the drawback with a melee weapon- you're limited to a certain range no matter how long your reach is. Well, unless you're Mikey. I don't think he thinks in terms of limits."

That chain can go as far as his little brother needs it to be so far as he can tell.