Okay for a default template store. Really not much to critique since we know that template looks decent. I would personally make it more game focused to appeal to your target market. A camo background or color scheme for example at the very least.
Like most new stores, you don't give contact & shipping information upfront which can deter sales. You don't mention what payment methods you accept either - I'd add their logos.
I replied to your other post about seo keyword issues, so won't mention you really should use them since I know you are working on it
Kudos on actually having product descriptions, though I would reorganize them a bit. Looking at some of yours, remember that you should describe the particular product first - what it is, what it does, why it's the best. Information on how its made is really secondary - Made in the USA and sturdy information is great, but when someone is familiar with the company and want to know what it is they are actually buying shouldn't be buried beneath it. Remember you can format your descriptions too - people read in short blocks and often skim, so use paragraphs, bullet points, etc. to capture their attention with the best features first.
Your store loads slowly for me on first visit - might be an issue with your hosting company or you may want to look at further optimizing your graphics and your site. Remember photos sell so I'd make them larger, crop them better, and really show off features, people using them, etc.
Not sure why you have google translate front and prominent - I believe your products cannot be sold to all countries, can they? I know I have restrictions for many bladed items, though only sell replica, non-working guns. Having google translate so prominent makes it appear you ship to all those countries and personally, I see little use for it.
A blog is always a good idea. If you shoot the guns yourself, stories about hitting the target range, tips on how to use your items, etc, is always a good way to bring in people. Since you sell parts, you might considering doing videos or at least step by step instructions on how to replace x or upgrade y. Videos are strong marketing tools these days.