Looking good! Just a couple of comments:
1) Additional filtering options for rifles (restricted/non restricted, bolt action/semi auto), same for pistols (semi auto/revolvers)
2) try and break accessories out in to categories (magazines, bags and cases, AR parts, etc)
3) Break optics down into categories (red dot/reflex, AR optics, and also by manufacturer)
4) Break down the ammo and reloading section, separate factory ammo from the reloading components then break reloading in to bullets, primers, powder, brass etc
5) The shop by vendor is good but maybe condense all the vendors into a drop down menu. This will leave you a lot more room to add links and maybe weekly specials or whatever you want people to see first.
6) If you don't have a shipping estimator, that would be key. It would save you from having to answer a ton of emails.
7) in your specials area, there are items with a sale symbol and items without a sale symbol. Is everything in that area on sale? If so, give them all the sale symbol, if not, move them to their perspective areas and out of the specials area.
Just my own comments. Take them for what they're worth. Site looks good though. Shoppers preferences are ever changing!
Thanks for the look.