PSC AAR Coupler, item 41238(?)?

Is this them?

The above photos look just like the Protocraft O-Scale couplers and draft gear pocket.     Go to  www.protocraft.com  and check out their fully functional AAR couplers. 

The coupler head looks the same, but the ones I have have a short shank with a round end and a hole.

Looking at the Protocraft photos, I still can't see what keeps the knuckle from opening, I hope I didn't file something off that I shouldn't have (it's OK, I have 3 more to fool with).

The couplers I have are from OK Engines (came with the 2 passenger cars I bought), OK part number K006, but the bag they're in says PSC # 41238.

It is difficult to describe in words, but the key is that vertical pin with the ramp and notch.  It works exactly the way a real coupler works - when the pin is down it blocks the back end of the knuckle.

Scale Craft, High Sierra, and Protocraft couplers work this way, and I believe PSC is a variant of Protocraft.

I use these couplers on pilots, since they are highly visible.  They work fine, but I suspect Kadee is better for complicated switching hobbyists.

Hot you are correct is this more like the one

Man, I just got home from "work".

Here's what I have:

It's most likely just like the Protocraft as far as assembly and function.  Maybe I have a burr (on the bag I opened) that needs to be filed smooth.

That 41238 may be OK Engines number for all I know.