And I learn more. This "brand" exists for marketing purposes only, so there is no support, no manuals and no spares. The unit itself was one of many cosmetically different models jobbed out by a Turkish state-owned factory to various customers around the world. The pieces look similar to others because a number of reputable brands have farmed out manufacture of bargain-basement brand extension to the same factory.
So, I'm on my own and I've decided that I don't like the looks of that ejector knob. Everything else seems to work about the way I expect it to, but the ejector appears deficient.
So I pressed it out (you have to look carefully, but its outline is present on the OD of the barrel extension), drilled the hole to c.2130 and tapped it 1/4UNF28 as I had access to a supply of high quality 1/4UNF28 bolts to work from. Good steel, by the way, although the temper is a bit softer than I would have expected. In any case, it tapped beautifully with lube and a sharp tool. The extension wall is thick enough for almost a diameter of fully formed thread, so the joint has at least the potential to be solid.
Then I waxed creative with the saw/file/lathe to make up a couple of different shaped alternate ejectors. That black oxide is pretty, but it sure shows every slip of the tool. It's nice to be working alloy steel again instead of the light metals; the feel of a sharp file cutting steel is pleasing.
The one on the right is a simple saw-tooth, made to look like what I see in the 1100. I sized it for the width of the extractor groove in the bolt... and then found that the pin is not centered in the groove. 'wasn't expecting that.
The middle was an attempt to move the ejection point forward a bit. It worked, and makes ejection of 2 3/4 shells more assertive. Unfortunately I didn't consider that the length of the receiver port (and barrel) leaves no room to spare for 3" shells. Moving ejection ahead even 3mm causes the shell corona to interfere with the breech face and prevents ejection.
The left-most is what I settled on. Similar to the original stock pin, but taller, wider and sharper. Also nice is that no direct impact force will act to rotate it (being round). This ends up looking much like the ejector pin on the Enfield, which is just about the definition of a proven design.
This next photo shows the two next to each other to show the difference in the profile that sticks up into the bolt path. The visible lighter area of the original pin shows where it protruded. Note the 45deg worn face where the shells actually impact. A screwdriver slot is cut into the bottom of the threaded pin.
Comparison of both installed in barrel extensions looks like this:
Now, the assembled unit shows a nice wide pin that fills the slot in the bolt. This image is actually a bit misleading, as I ground a 0.8x0.4mm chamfer onto the end of the bolt slot. The pin now has a height equal to the nominal slot depth in the assembly, but since it was just possible to get it to snag on the pin (if you pushed it against the wall hard while moving forward) I added the chamfer to guide it over the pin if necessary. No such chamfer was required on the sides as the round pin allows a smooth mate.
I will retain the new pin using 262, preceded with a brake cleaner rinse and a shot of 7649 to make sure I get full cure. I'm a bit leery about using a chemical retainer, but gray-haired wrench benders have told me that it works so I'll give it a go. My other option is a plug weld, but that is too permanent given that this may not work. I also don't want to deform the cylindrical interface.
Now to cross-drill and half-plug the front gas block so that 3" shells don't rattle my teeth when the bolt bottoms out in the receiver. Then I'll see about finding a place to test fire it. If both mods work I'll do the same to the other barrel I have.
If not.... then I get to practice Stoic resolve and smile at my failure.
