#1, Just forget forums & call MOM!
Most of this information from these people is wrong except the one that says the magazine lockout spring is in the bottom of the grip on the right side. My C9 NEVER makes any rattling noise with a mag in or out. if the magazine lockout is making noise it can only be because it is installed wrong and if it is installed wrong you'll have problems with the magazine working right. it's under tension with a magazine in or out. bu then again maybe mine is not noisy because I lube in the grips copiously with Vaseline i use Vaseline because Vaseline liquefies when heated and then solidifies again whereas practically useless gun oil just evaporates and goes away when it gets a little warm and then your weapon locks up. You can use silicon grease too, but gun oil is about the most useless lubrication on the planet for a gun, if you coat your weapon with it to keep it from rusting, it will evaporate in the closet while not being used in the air conditioning and still let your weapon rust. But Vaseline will not. Furthermore the 2 drops of oil down the magazine well recommended by the manufacturer is pure hogwash. trained and certified weapon experts have told me variously "all the manufacturers say that, I don't know why, but you should oil the pi** out of it and then oil it some more" and also to "use Vaseline." Incidentally my trigger got smoother when i copiously lubed the parts inside the grips with Vaseline. Finally, as I said just call MOM up and he'll most likely tell you exactly what is causing it and will send you a part to correct it if that is what it needs. Just because a weapon doesn't cost a lot doesn't make it a throw away. I find my 9 to be very accurate and very reliable as well the more I use it which to me is all that counts.Furthermore, when I bought it I tried all the others for trigger pull and they were all bow strings too, Hi-point no worse than the $900 ones.
But mainly, the idea that this gun is somehow not reliable because it doesn't cost very much and makes a little noise, is unsound logic. It's not how little it costs that makes it valuable or not, IT'S HOW WELL IT WORKS. Mine has a better trigger pull after breaking it in than any $900 pistol. The creep, drag, play, release of my trigger combined is about 1/32" and feels like about 3 lb pull although I was told it can't be because it will go fully auto with under a 6 lb pull. it came with 10 lbs, a real bear and I called MOM and he said to send it in and he'd lighten it to 6 lbs under warranty for free and sent it back with a new mag, ghost ring sight, all the stuff it came with new. Get S&W to do that! Plus with a phone call, MOM sends me any part I ask for for free. And after shooting an S&W .380 "BodyGuard the other day and getting a-load of the inch long trigger creep that feels just like the trigger on my $20 BB pistol, I'd be using the S&Ws for a spare if I was stupid enough to spend $450 for the junk. My Hi-Point 9 may have cost only $150, but at least the trigger doesn't feel like drawing the string on a bow M&P S&W .380 that cost 2-3 times more.