Hi all,
I'm not sure how much of a problem this is, but it is something for everyone else to look for on their Steyrs. First, the back story. I have an M40 which is probably runnning about 11-12 thousand rounds. A couple months ago, while cleaning my baby, I noticed what looked like a small pit in the bottom of the slide. If looking at the bottom of the slide with the muzzle pointed away from you, it is just to the left of the rails that pick up the next round off of the magazine. I thought that something had probably gotten wedged in the slide while firing, and knocked off a small nick out of the steel. The gun functions fine, and the "pit" seemed to grow no larger, so I didn't worry about it.
Well, fast forward to this past saturday, and I am now cleaning my M40 after 300 rounds out on the mesa. There was a little dirt blowing around, so I figured I would pull down the extractor and give it a good cleaning. So I have my slide totally detail stripped (except the LCI) and am giving it a good look over with my SureFire (as I inspect every part when removing and reinstalling into my weapons). At some point, I notice a small flash of light THROUGH the slide. Uh Oh...
If you look at the extractor, it has the "claw" end and the "post" end (for lack of a better term). The "post" end pivots down into a hole drilled in the channel for the extractor in the slide. If I take my stripped slide and look down into the hole in the channel for the "post" of the extractor, I can see light coming through! I have a crack running from the bottom of this hole, all the way through to the bottom of slide (which isn't actually all that far from the looks of it). I can clearly see light through the hole, and it is missing steel in the crack. This is what made the "pit" in the bottom of the slide I had noticed earlier.
So, I'm not sure how big a deal this is. I have over a thousand rounds (at least) through the M40 since I first noticed the crack, and haven't had any noticeable problems. Also, I have not noticed the "pit" get any larger from when I first saw it, so it does not seem to be growing. However, any time the slide cracks on any semi-auto, it can't be a good thing. So, anyone else seen this problem before? Should I be worried? This is a CDNN M40, so I'm not sure that anything can be done about it. I really love my M40, and I don't want to have to retire it yet!
BTW, right now I don't have a digicam capable of getting a good shot of this. I may try with my video camera and pull a still off of that, but usually those are not very good quality. I will try it out this evening and see what I get. Thanks all for your help / opinions!
James