Nope no post limit as far as I know. It would be very interesting to see the particular failure there, but as I said yours sounds like a very rare occurence. Honestly I've never heard of it happening before, the gun being shipped with a clearly broken part, or a part that isn't as it's supposed to be, so I tend to be skeptical. In any case the LCI is not a big functional problem as long as you get it taken care of. Ruger will almost certainly take the gun back and put a brand new one in there and send you back the pieces. Also, there's no "spike" on the end of it (or maybe we're talking your terminology vs. mine here). The LCI is designed to slide up and over the cartridge rim when the gun goes into battery because of the 45 degree bevel cut into the front of it, and then slide off the cartridge rim and lay flat and flush with the surface of the slide when there is nothing in the chamber.
I didn't take another picture from the side showing just how precisely the LCI should match up to the back of the barrel when there's no round in the gun. On my SR9 the very rearward surface of the barrel is maybe 2 or thousandths higher than the LCI when the gun is unloaded. Very close, and the barrel actually slopes downward slightly toward where it locks into the slide. By the way after more than 2,000 rounds I have basically no barrel peening/slide to barrel wear, etc., etc. I've got a little scuff mark on the top of the barrel, that's it. That's why I like my SR9
.
It's never supposed to "lock up" or hang up on anything. It's also *not* supposed to lay flat, or almost flat, when the gun is loaded - it should stick up by at least 1/16th to 1/8th of an inch. It was very specifically designed and if yours isn't working right, there's a reason. The question is what the reason is. It could be that someone tried to cut it down, did a bad job, returned the gun, and then you got the gun back "as new" with a piece of tape on the box and all that.
Here is what mine looks like:
Slide locked back, unloaded.
Loaded, slide in battery.
Slide forward, chamber empty.