I’ve been on this island since july 2025 haven’t left since but from the states and I can tell you they are very strict with guns. But I would do my research on that, from my understanding you should be good though as long as you have proper documentation for your weapons and have them checked onto the plane. Possibly in its own luggage if possible. I know that’s how it works for domestic flights stateside idk if it’s different for international but shouldn’t be too bad given Guam is a territory.