My (reasonably) local Airsoft shop is a lot better than this, but they also have a website that is pretty terrible (and often unavilable for hours at a time). I would never order from them online, as what the website shows as in stock or not in stock bears no relation to what's in the shop. And it's super glitchy to use on a mobile phone.
I get it: the margins on airsoft kit is probably tiny, you're selling to a niche market, the staff are mostly there because they're enthusiasts (and not particularly well paid but maybe get discounts on the kit) and that, in this day and age, a online shop is another way to bring in much-needed revenue.
But, if you're going to do an online shop... do it bloody well, otherwise you're actually harming your business way more than not having an online shop.