I had a 1-hour intervew yesterday and a 2-hour interview today for a different position within my company (different department, so different management). I was self-employed before I started working there, so my own company (Adrenaline Arms) is on my resume' as a prior and current job.
It was a 2-part interview today, and both of the people interviewing me today commented on it, asking if I was a shooter. I'm proud of what I am, not ashamed, so my answer to both of them was
"Yes, and a collector as well. I have been for many years". If it hurts me, then I'll deal with it. Fortunately in my line of work it'll probably help me.
My suggestion is to downplay it but don't deny it. You may want to expand on "sporting goods" rather than "firearms", since a lot of sheeple do get scared when they hear about guns.
Anyway, good luck to you!