yes 100% deal breaker, i'll be gone with the wind in an instant. you won't even be able to finish your sentence because i'll be gone before then, i'll be like flash; one second i'm a loving girlfriend and the next i'm gathering my stuff and getting the fuck out of there. i'd be like https://pbs.twimg.com/media/CSX1SX3UsAAGSTd.jpg
I don't know, why do you have guns? You don't really need them, one is more than enough. Just sounds suspicious to have guns in your house when they are a rather unnecessary and dangerous thing to have.
It's a deal breaker for me. Every "responsible" gun owner says the same thing, the guns are locked up, they're safe, etc. and yet deaths related to guns and suicides do happen 100% more often in homes with guns... well, because there are guns in the home. Rather than argue back and forth about it, you're totally welcome to find someone who loves and appreciates your guns. I'm just not that type. I live in a state where guns are everywhere, and I've still never owned one.
Most of the guys I've dated have owned guns (I'm from a rural area), so it's normal to me. If he's obsessed with them or seems excited about getting the chance to "stand his ground" ... That's a red flag.