/diy/ - Do It Yourself

I bought a post-exposition nailgun in a bid, but it came in with an air leak. it looks new, but when I plugged it in to the compressor, there's a hiss near the trigger. it still shoots. Can it be fixed or should I just send it back? I'd rather not return it, because I got it for less than 20$ with a case and a few k of nails and staples