I've also noticed a small indent on the frame where the hammer comes into contact, I'm not sure if that little notch is normal or not, I never looked at that spot when it was new and I examined it for the first time.
Also, since this was new I did notice occasionally when I manually slid the slide back (I did have the odd, rare jam too but it wasn't this hard), the nozzle was stuck forward like that so I added some lube to the underside so it would get on the o-ring, and I figured maybe a stronger nozzle return spring would help? Not sure, it would take quite a while to get one anyways and I'd have to find a site that doesn't charge a huge amount for shipping, if it would even be worth it. Again waiting to hear back from the guys I bought it from.