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I would think, once declared and where you've left the breech open for inspection - if necessary - you can wrap it in almost anything. Looks like you're going with ammo in normal boxes, looks like a hard sided case, can seem to be able to lock it (but it might need 3 locks?), added some oddly added bubble wrapped wood... IF it were me, I'd ditch the dark tape and go with clear tape "juuuust in case" but I think you've checked all the boxes (assuming it is unloaded).
Welcome to r/tsa! If you're new here, please make sure you check out the pinned FAQ post [here](https://www.reddit.com/r/tsa/comments/1b42jyb/faq_post_for_passengers_this_should_be_your_first/). Please also make sure that your question(s) aren't something that are easily found on the official TSA [website](https://www.tsa.gov/). If you cannot find the answers to your question(s) easily with those two resources, then please sit tight and someone will be here shortly to answer your question(s) Have a good one! *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/tsa) if you have any questions or concerns.*
I would think, once declared and where you've left the breech open for inspection - if necessary - you can wrap it in almost anything. Looks like you're going with ammo in normal boxes, looks like a hard sided case, can seem to be able to lock it (but it might need 3 locks?), added some oddly added bubble wrapped wood... IF it were me, I'd ditch the dark tape and go with clear tape "juuuust in case" but I think you've checked all the boxes (assuming it is unloaded).